This listing includes all the body colour variations that I have noted, but there are no doubt some I have missed.  Most models had silver trim applied front and rear, and most early Flyers had contrasting coloured stripes printed on the bonnet and boot.

Other component colours
Baseplates were usually painted silver; some early baseplates were unpainted, and a few Commercials had baseplates in other colours.  Windows were usually clear plastic, but late Commercials had slightly tinted windows and some Firenzas had strongly tinted windows in blue, orange or green.  Many interior colour variations exist.  These component colour variations are not included in the listings, and of course on the Flyers different combinations of variations can be created since the models can be dismantled.

Wheels
On the Impy cars, two distinct types of wheel were used.  The earlier style was a push-fit hub cap on the end of the axle, combined with a black plastic wheel/tyre with heavy treads.  The later type was a conventional metal wheel with riveted axle ends and thin treaded tyres.  The first two photos of no.12 Chrysler below show the two types.  Earlier Flyers had black wheels with a silver ring of foil; from 1971 this changed to a five spoke foil design.

See also James Robertshaw's new website for some interesting and rare variations:  https://lonestardcmt.co.uk/

No.7 Vauxhall Firenza (1971-76)     Right hand drive, VAUXHALL cast on body and base, Flyers wheels.         White         Orange-brown         Red         Silver            Metallic brown         Metallic light blue         Metallic dark red         Metallic gold         Metallic green            Metallic turquoise-blue         White, 'Budget Rent a Car' label on roof     Left hand drive, VAUXHALL name blanked out, Flyers wheels         White         Orange-brown         Red         Silver         Metallic brown         Metallic light blue         See text for discussion of the plated model.
No.8 Ford Capri     Not issued
No.9 Maserati Mistral (1970-76)     Flyers wheels         Purple plated         Pink plated         Dark red         White
No.10 Jaguar Mk.X (1966-76)     Impy wheels         Red         Metallic mauve         Silver         Blue     Flyers wheels         Metallic dark green         Blue         Cream
No.11 Chevrolet Corvette Stingray 'Gran Turismo' (1966-76)     Impy wheels, '8' printed on bonnet         Dark green         Pale blue     Flyers wheels         Metallic turquoise-blue         Metallic red-brown
No.12 1963 Chrysler Imperial (1966-76)     Impy wheels         Metallic light blue         Pale green         Yellow     Flyers wheels         Metallic dark blue         Metallic dark blue, bonnet cast shut, with plastic roof rack and boat
No.13 Ford Thunderbird     Not issued
No.13 Toyota 2000GT (1971-76)     Flyers wheels         Purple plated            Metallic dark red painted         Metallic gold painted
No.14 Ford Zodiac Mk.III Estate (1966-76)     Impy wheels, earlier models had two large individual jewelled headlights on each side of the grille, later there was a pair of smaller jewels in a separate diecast mount on each side         Metallic blue                Turquoise     Flyers wheels         Metallic gold         Pale yellow         Metallic dark green
No.15 Volkswagen Microbus (1966-76)     Impy wheels, opening engine cover and rear door, earlier models had open rear quarter windows         Blue         Yellow     Flyers wheels, engine cover cast shut         Maroon         Yellow-ochre         Pale green     Flyers wheels, engine cover and rear door cast shut         Pale green with blue, yellow or orange plastic luggage on roof
No.16 Ford Zodiac Mk.III Estate Police Car (1966-76)      Earlier Impy models had two large individual jewelled headlights on each side of the grille, later there was a pair of smaller jewels in a separate diecast mount on each side (see photo under no.14 above).     Impy or Flyers wheels, POLICE printed on bonnet, plastic roof beacon         White
No.16 Chrysler Imperial Police Car     The FIRE CHIEF version is rare, and perhaps was an unissued factory prototype or trial model.     Impy wheels, plastic roof beacon         White, POLICE printed on bonnet         Dark blue, POLITIE AUTO printed on bonnet (Dutch issue)         Red, FIRE CHIEF printed on bonnet     Flyers wheels, plastic roof beacon         White, POLICE printed on bonnet         Very dark blue, POLITIE printed on bonnet (Dutch issue)
No.16M Mercedes-Benz 220SE Police Car (for German and Swedish markets, about 1968)     Impy wheels, POLIZEI or POLIS printed on bonnet, plastic roof beacon         Very dark green
No.17 Mercedes-Benz 220SE (1966-76)     The Impy model without jewelled headlights is a rare and unusual transitional variation, not seen on other models in the range.     Impy wheels         Light grey (shades vary to off-white)         Metallic red, with or without jewelled headlights     Flyers wheels         Metallic purple         Metallic light blue         Light blue
No.18 Ford Corsair (1966-76)     Impy wheels         Metallic maroon     Flyers wheels         Metallic mauve         Metallic red         Cream         Light blue         Metallic light blue
No.19 Volvo 1800S (1967-76)     Impy wheels         Pale grey (shades vary to off-white)     Flyers wheels         Metallic red         Salmon-pink
No.20 Volkswagen Ambulance (1967-76)     Impy wheels, plastic roof beacon, opening engine cover and rear door, earlier models had open rear quarter windows         White         Dark blue, POLITIE printed on doors (Dutch issue)     Flyers wheels, plastic roof beacon, engine cover cast shut         Off-white, rear door opening or cast shut         Very dark blue, POLITIE printed on door (Dutch issue), rear door opening or cast shut
No.21 Fiat 2300S Coupe (1967-76)     Impy wheels         Pale green         Metallic light blue     Flyers wheels         Metallic emerald green         Pink plated     Flyers wheels, bonnet cast shut, with plastic roof rack and canoe         Metallic green         Green
No.22 Rolls-Royce Silver Cloud III Convertible (1967-76)     Impy wheels         Silver         Metallic mauve     Flyers wheels         Metallic dark red         Metallic blue         White
No.23 Alfa Romeo Giulia 1600 Spider (1967-76)     Impy wheels         Red            Pale blue         Dark green     Flyers wheels         Metallic silver-grey         Metallic light blue         Blue         Red
No.24 Foden Eight-wheel Tipper (1967-74) Cab Chassis Body Wheels Dark green Black Metallic grey Black plastic Green Black Metallic grey Black plastic Dark blue Black Metallic grey Black plastic Green Black Beige Black plastic Green Black Orange Black plastic Dark blue Black Orange Black plastic Green Black Orange Hi-Speed Red Black Orange Hi-Speed
No.25 International Harvester Tractor Shovel (1967-75)     Blue, orange or red plastic wheels with black tyres         Blue         Yellow         Orange
No.26 Foden Eight-wheel Petrol Tanker (1967-75) Cab Chassis Body Labels Wheels Dark blue Black Red 'Mobil' Type A Black plastic Green Black Red 'Mobil' Type A Black plastic Dark blue Black Red 'Mobil' Type B Black plastic Dark blue Black Red 'Mobil' Type B Hi-Speed Blue Black Red 'Mobil' Type B Hi-Speed Red Black Red 'Mobil' Type B Hi-Speed Green Maroon Red 'Mobil' Type B Hi-Speed Green Maroon Red 'Mobil' Type C Hi-Speed Blue Black Yellow 'Shell' Hi-Speed       'Mobil' labels: Type A - rectangular, without border                           Type B - rectangular, with border                           Type C - angled, with border (old stock labels from no.404)
No.27 Ford Taunus 12M (1967-76)     Impy wheels, with towing hook         Blue         Pale yellow         Metallic red     Flyers wheels         Metallic dark orange, with towing hook         Metallic green, with or without towing hook     Flyers wheels, bonnet and boot cast shut, without towing hook         Metallic green         Pale green         Lilac, with plastic roof rack and surf boards
No.28 Peugeot 404 (1967-76)     Impy wheels         Metallic blue, with towing hook         Turquoise, with towing hook         Metallic red, without towing hook     Flyers wheels         Metallic red, with or without towing hook         Turquoise-blue, without towing hook         Green, without towing hook     Flyers wheels, without towing hook, bonnet and boot cast shut         Silver-grey metallic, with plastic roof rack and skis         Green, with plastic roof rack and skis         Yellow, with plastic roof rack and skis
No.29 Cement Mixer Lorry     Not issued
No.29 Foden Eight-wheel Box Van (1969-75) Cab Chassis Body Labels Wheels Dark green Black Dark green Lucas Batteries Black plastic Dark blue Red Metallic grey  Express Freight Black plastic Dark blue Red Metallic grey Express Freight Hi-Speed Blue Red Metallic grey Express Freight Hi-Speed Blue Black Metallic grey Express Freight Hi-Speed Blue Red Green Express Freight or Japanese Hi-Speed Blue Black Green Express Freight or Japanese Hi-Speed Green Maroon Green Express Freight Hi-Speed
No.30 AEC Merryweather HTTL Fire Engine (1967-75)     Later issued as no.1252 (1980-84) Body Turntable Ladder (plastic) Base Wheels Red Unpainted metal Metallic grey Metal Black plastic Red Unpainted metal White Metal Black plastic Red Unpainted metal White Metal Hi-Speed Red Silver painted metal White Metal Hi-Speed Red Red metal White Metal Hi-Speed Red Metallic grey plastic Metallic grey Plastic Hi-Speed
No.31 Ford Transit Breakdown Lorry (1967-75)     'Esso' labels and metallic grey plastic towing cradle Body Jib Base Wheels Dark blue Unpainted Metal Black plastic Dark blue Silver Metal Hi-Speed Blue Silver Metal Hi-Speed Blue Yellow Metal Hi-Speed Sea-green Orange Plastic Hi-Speed
No.32 Ford Corsair Fire Chief Car (1968-76)     Impy wheels         Red, FIRE CHIEF printed on bonnet         Red, FEUERWEHR printed on bonnet (for German speaking markets)     Flyers wheels         Dark red, FIRE CHIEF printed on bonnet         Red, FIRE CHIEF printed on bonnet
No.33 BLH Austin-Western Mobile Crane (1968-75)     Red plastic wheels with black tyres         Turquoise body and crane         Yellow body, orange crane         Green body, yellow crane
No.34 Euclid 82-80 Twin-Power Crawler Tractor (1968-75)     Red plastic wheels         Yellow body, dark blue rubber tracks         Lime green body, red-brown rubber tracks
No.35 Articulated Flat Truck     Not issued
No.36 Lotus Europa (1969-76)     Flyers wheels         Lemon-yellow         Yellow         Orange
No.37 Ford GT40     Not issued
No.38 Chevrolet Corvette Stingray (1971-76)     Flyers wheels         Lemon-yellow         Yellow         Metallic red-brown
No.39 Ford Mustang (1971-76)     Flyers wheels         Metallic brown         Metallic gold
No.40 Cadillac Eldorado     Flyers wheels, plastic roof rack with spare wheels, no towing hook (1976)         Yellow         Red     Flyers wheels, with towing hook, from set no.185 (1977-79)         Red         Green
No.41 Builders Supply Lorry     Flat lorry with plastic girders, Hi-speed wheels         Leyland 8-wheel Flat Lorry (this list includes variations issued as no.44) (1972-74) No. Cab Chassis Body Bolsters 44 White Maroon Turquoise Black 41 Maroon Black Yellow Black 44 White Maroon Green Black 44 White Red Turquoise ? 41 Maroon Black Light blue Unpainted * Green Green Green Unpainted * Green Green Yellow Unpainted or posts cast with body * Green Blue Green Unpainted or none or posts cast with body * Green Blue Yellow Posts cast with body *The asterisked variations are not specifically associated with just one of nos.41 and 44 - any of these variations may have been issued as either or both numbers. Foden half cab 6-wheel Flat Lorry (this list includes variations issued as no.45) (1975) No. Cab Chassis Body 41 Green Green Cream 41 Green Green Yellow 41 Green Green Turquoise 41 Sea-green Blue Turquoise ? Sea-green Blue Yellow 41 Turquoise Red Blue 41 Turquoise Red Yellow 45 Blue Off-White Black 45 Light Blue Light Blue Yellow
No.42 Foden half cab 8-wheel Tipper 'Tilcon' (1972-74)     TILCON labels, hi-speed wheels         Pale blue cab with or without maroon roof, maroon chassis, pale blue tipper
No.43 Routemaster Bus     Not issued in this range - was issued as no.1259
No.43 Leyland 6-wheel Flat Lorry with four pipes (1975)     Plastic pipes, Hi-speed wheels         See no.44 for colour variations
No.44 Marine Transport Lorry     Flat lorry with plastic Tuf-Tots speedboat, Hi-speed wheels Leyland 8-wheel Flat Lorry (1972-74)     See no.41 for colour variations Leyland 6-wheel Flat Lorry (this list includes variations issued as no.43) (1975) No. Cab Chassis Body 43 Green Green Yellow 44 Yellow Yellow Mauvish-blue 44 Mauve Blue Green 43 Black Black Red
No.45 Foden half cab 6-wheel Flat Lorry with two giant pipes (1975)     Plastic pipes, hi-speed wheels         See no.41 for colour variations
No.46 Leyland 6-wheel Dropside Lorry (1975)     Hi-speed wheels Cab Chassis Body Green Green Yellow Yellow Blue Yellow Yellow Blue Blue Yellow Orange Blue Orange Orange Blue
No.47 Leyland 6-wheel High Side Lorry (1975)     Hi-speed wheels Cab Chassis Body Green Orange Orange Orange Orange Orange Off-White Blue Blue
No.48 Foden half cab 6-wheel Hopper Lorry (1975)     Hi-speed wheels Cab Chassis Body Turquoise Red Orange Turquoise Green Orange Light Blue Off-White Orange Orange Blue Blue
No.49 Foden half cab 6-wheel Tipper (1975)     Hi-speed wheels Cab Chassis Body Green Black Yellow Off-White Black Yellow Off-White Black Orange Pale blue Black Yellow

New Impy Cars

No.71 Range Rover (1978-84)     Metallic green
No.72 Cadillac Eldorado (1978-84)     Metallic copper, some with plastic roof rack and skis
No.73 Chevrolet Corvette Stingray (1978-84)     Metallic blue
No.74 Toyota 2000GT (1978-84)     Yellow
No.75 Range Rover with roof beacon (1978-84)     White with orange stripes     Red, FIRE or BRANDWEER printed on bonnet     White, AMBULANCE and green cross printed on bonnet     White, red cross printed on bonnet     Very dark blue, RNLI RESCUE printed on bonnet (see set no.185)
No.76 Chevrolet Corvette Stingray 'GT Rally' (1978-84)     Metallic dark red
No.77 Jaguar Mk.X (1979-84)     Metallic blue, without or with towing hook.
No.78 Maserati Mistral (1979-84)     Metallic dark red
No.79 Ford Mustang (1979-84)     Dark blue
No.80 Lotus Europa (1979-84)     Orange
No.81 Volvo 262 Coupe (1979-84)     Silver, some with plastic roof rack and skis
No.82 Mercedes-Benz (1979-84)     White
Impy Major set no.185 (1977-84)     Flyers no.40 Cadillac with Tuf-Tots boat and trailer (1977-79)     Impy no.71 Range Rover with Tuf-Tots boat and trailer (1980-83)     Impy no.77 Jaguar with cabin cruiser and trailer (1984)     Impy Range Rover 'RNLI' with Tuf-Tots speedboat or RNLI dinghy and trailer (promotional, 1980s)

Retailer Display Material

No.201 Roadway Display for two cars (1966-9)     Note reproductions exist of this item No.202 Wire Dispenser for 144 boxed Impys or Flyers No.203 Vinyl Impy Display Figure (1966-9) No.204 Impy or Flyers wall-mounted plastic showcase No.206 Flyers rotating display for blister packed models No.207 Flyers leaflet 1970 No.208 Flyers showcard No.209 Loop-the-loop display stand

Gift Sets

No.301 Containing six cars (1967-78) No.302 Containing six cars (1967-77) No.303 'Mobil' Gift Set, containing nos.24, 401, 404 and one car (1968-76) No.304 Commercial set containing nos.24, 25, 26, 30 and 31 (1968-78) No.309 Commercial set containing nos.24, 25, 26, 30, 31, 33, 34 and five cars (1968-78)

Flyway Track and Accessories

No.310 Starter Set - includes loop-the-loop, one car (1970-72) No.312 Super Set - includes loop-the-loop, 180degree bend, start and finish gates, 2 cars (1970-2) No.313 Double Set - includes two loop-the-loops, two cars (1970-72) No.315 Strip Set - includes one car (1970-72) No.403 Catapult Starter (1972) No.406 Fixing Clamp (1970-71) No.409 Loop-the-loop assembly (1970-72) No.411 Twin Start Gate (1970-72) No.412 Twin Finish Gate (1970-72) No.413 180degree bend (1970-72)

Other Accessories

No.401 Car Lifting Ramp (1967-72)     Red base, silver ramp, blue plastic pumps; blue plastic air gauge or white plastic searchlight
No.402 Lock-Up Garage (1967-71) Building Roof Door Cream Brown Brown Brown Cream Cream Brown Brown Cream
No.403 Service Station     Not issued (see text)
No.403 or 406 Fire House     Not issued (see text)
No.404 Petrol Pump Island with Canopy and Forecourt Sign (1968-72)     Blue plastic pumps, red plastic canopy         White base and sign, 'Mobil' labels without border         Silver base and sign, 'Mobil' labels with border, pump labels also vary
No.405 Service Station     Not issued (see text)
No.414 Fire House with Fire Engine and Fire Chief Car     Not issued (see text)

Impy Two-Packs (about 1968)

No.418 Foden Tipper (no.24) and Tractor Shovel (no.25) No.422 VW Ambulance (no.20) and Mercedes 'Polizei' (no.16M) No.423 Fiat 2300S (no.21) and Breakdown Lorry (no.31) No.424 Foden Tanker (no.26) and Ford Taunus (no.27) No.425 Ford Zodiac (no.14) and Tractor (no.25) No.427 Alfa Romeo (no.23) and Petrol Pumps (no.404) but not the 'Mobil' sign No.431 Gran Turismo Coupe (no.11) and Fiat 2300S (no.21) No.432 Fire Engine (no.30) and Ford Corsair 'Feuerwehr' (no.32)

Soccer Champs

Nos.1621 to 1632  Impy cars nos.77, 81 and 82 with English football team logos     Not issued (see text)