The Trojan T103 was a racecar which was designed by Ron Tauranac. The car was raced during the 1974 season of Formula One.
The car made its debut at the 1974 Spanish Grand Prix being driven by Tim Schenken. The car finished 14th due to a sin-out during the race.
The T103 had a Ford Cosworth DFV V8 engine and rode on Firestone tyres. The car had an aluminium monocoque chassis and a five-speed Hewland DG 300 gearbox. The car was fitted with a Duckhams carburettor.
The car did not endure any decent success through its career due to technical problems and failing to qualify.