He first entered the British Saloon Car Championship in 1978 driving a Ford Capri 3.0, finishing 2nd in class.

[1] However, the success was short-lived, as the Rovers were found to be in breach of the regulations regarding the engine installation, and TWR was thrown out of the championship, handing victory to Andy Rouse.

[2] His success continued afterwards, winning the new Group A class at the 1984 Bathurst 1000 in Australia driving a TWR Rover partnered by regular ETCC co-driver Armin Hahne from Germany.

This was followed in 1986 when he won the prestigious ETCC Tourist Trophy at Silverstone in a TWR prepared Rover along with co-driver, former Formula One World Champion Denny Hulme.

[4] He missed both 1986 and 1987, before returning in 1988 with Walkinshaw to drive the new Fuel injected Holden VL Commodore SS Group A SV.

Ironically, the winner of the 1990 Bathurst 1000 was the Holden Racing Team VL Commodore SS Group A SV driven by Allan Grice and Allam's long time TWR teammate Win Percy.

In May 2011 Jeff Allam was appointed as Driving Standards Advisor to the BTCC, assisting the Clerk of the Course in investigating on-track incidents between competitors.