The Triumph TR5 was built for a 13 month period between August 1967 and September 1968 by the Triumph Motor Company in Coventry, England. Visually identical to the Michelotti styled TR4, the TR5 hid the main differences under the body, the most significant of which was the engine. The TR5 boasted a 2.5-litre straight-6 fuel-injected engine developing around 150 bhp (112 kW). This engine was carried forward to the TR6.
At the time, fuel injection (or PI petrol injection, as it was sometimes then called) was uncommon in road cars. Triumph claimed in their sales brochure that it was the "First British production sports car with petrol injection". This engine could propel the TR5 from 0 to 50 mph (80 km/h) in just 6.5 seconds, and on to a top speed of 125 mph (201 km/h). Road tests at the time reported slightly different performance figures.
Standard equipment included front disc brakes, independent rear suspension, rack and pinion steering and a four speed gearbox. The available optional extras included overdrive, wire wheels and a hard top with detachable roof panel – known as the Surrey Top.
In 1968, the basic price of the TR5 in the UK was £1,260 including taxes, with wire wheels being another £38, overdrive £60 and a tonneau cover another £13.
The TR5 was produced in small numbers when compared with the later TR6, with just 2,947 units produced – the first car being assembled on 29 August 1967 and the last on 19 September 1968. Of these, 1,161 were destined for the UK market, the remainder being LHD TR5s and going to France, Belgium and Germany amongst others. In a similar period 8,484 TR250s were built for the U.S market. In Q1 2011 there were approximately 410 licensed and 74 SORN TR5s registered with the DVLA.
The TR250, built during the same period for the North American market, was nearly identical to the TR5. But, because of price pressures and emission regulations the TR250 was fitted with twin Zenith-Stromberg carburettors rather than the Lucas fuel injection system, and took 10.6 seconds to get to 60 mph (97 km/h).
Bodywork. Length/width/height/wheelbase – cm (in): 390/147/127/224 (153.6/58/50/88); weight : 1030 kg (2273 lb).
Engine. Inline 6 2498 cc (152 ci), front-mounted, 12 valves, 2 carbs Zenith-Stromberg, manual 4-speed gearbox, rear-wheel drive. Maximum power : 111 bhp @ 4500 rpm; torque : 193 Nm @ 3000 rpm. Top speed : 174 km/h (108 mph); 0 – 60 mph in 11.2 sec.