Picture Of Triumph Spitfire Classic Cars

The American market Spitfire 1500 is easily identified by the big plastic over-riders and wing mounted reflectors on the front and back wings. The US specification models up to 1978 still had chrome bumpers, but on the 1979 and 1980 models these were replaced by black rubber bumpers with built-in over-riders. Chassis extensions were also fitted under the boot to support the bumpers.


Detail improvements continued to be made throughout the life of the Mark IV, and included reclining seats with "chequered brushed nylon centre panels" and head restraints, introduced for domestic market cars early in 1977 along with a new set of column stalk operated minor controls (as fitted already in the TR7) replacing the old dashboard mounted knobs and switches. Also added for the model's final years were a wood dash, hazard flashers and an electric screen washer, in place of the previous manual pump operated ones. Options such as the hard top, tonneau cover, map light and overdrive continued to be popular, though wire wheels ceased to be available.


The 1980 model was the last and the heaviest of the entire run weighing in at 1,875 lb (850.5 kg). Base prices for the 1980 model year were $5,995 in the US and £3631 in the UK. The last Spitfire, an Inca Yellow UK-market model with hardtop and overdrive, rolled off the assembly line at Canley in August 1980, shortly before the factory closed.

Picture Of Triumph Spitfire Classic Cars

In 1973 in the United States & Canada and 1975 in the rest of the world, the 1500 engine was used to make the Spitfire 1500 though in this final incarnation the engine was rather rougher and more prone to failure than the earlier units, torque was greatly increased which made it much more drivable in traffic. The reason for the engine problems was due to continued use of three main bearings for the crank shaft.


While the rest of the world saw 1500s with the compression ratio reduced to 8.0:1, the American market model was fitted with a single Zenith-Stromberg carburettor and a compression ratio reduced to 7.5:1 to allow it to run on lower octane unleaded fuel and after adding a catalytic converter and exhaust gas recirculating system, the engine only delivered 100 bhp (75 kW) with a fast 0-60 time of 14.3 seconds.


The notable exception to this was the 1976 model year, where the compression was raised to 9:1. This model produced over 100 mph (160 km/h).

Picture Of Triumph Spitfire Classic Cars

An all-new hardtop was also available, with rear quarter-lights and a flatter rear screen.

By far the most significant change, however, was to the rear suspension, which was de-cambered and redesigned to eliminate the unfortunate tendencies of the original swing-axle design. The Triumph GT6 and Triumph Vitesse had already been modified, and the result on all these cars was safe and progressive handling even at the limit.


The Mark IV went on sale in the UK at the end of 1970 with a base price of £735.

Picture Of Triumph Spitfire Classic Cars

The Mark IV brought the most comprehensive changes to the Spitfire. It featured a completely re-designed cut-off rear end, giving a strong family resemblance to the Triumph Stag and Triumph 2000 models, both of which were also Michelotti-designed. The front end was also cleaned up, with a new bonnet pressing losing the weld lines on top of the wings from the older models, and the doors were given recessed handles and squared-off glass in the top rear corner. The interior was much improved: a proper full-width dashboard was provided, putting the instruments ahead of the driver rather than over the centre console. This was initially black plastic however was replaced by a wooden one in 1973. The engine continued at 1296 cc, but in 1973 was modified with larger big-end bearings to rationalize production with the TR6 2.5 litre engines, which somewhat decreased its "revvy" nature; there was some detuning, to meet new emissions laws, which resulted in the new car being a little tamer than the Mark III. The gearbox gained synchromesh on its bottom gear.

On 8 February 1968, Standard-Triumph General Manager George Turnbull personally drove the 100,000th Triumph Spitfire off the end of the Canley production line. More than 75% of the total production had been exported outside the UK including 45% to the USA and 25% to mainland European markets.


Starting in 1969, however, US-bound models had to be changed to comply with new safety/emission regulations. It basically ended an era and you may hear models after 1969 be referred to as "federal" Spitfires. The changes included a slight decrease in horsepower (68 bhp) due to emissions control, the instrument panel was moved in front of the driver, and new seats were introduced which had integrated headrests to help against whiplash.