Alta's first vehicle was a sports car powered by a 1.1L engine, featuring an aluminium block, wet liners, and shaft-driven twin overhead camshafts, which Taylor designed himself.

They became popular among club racers due to their ability to be converted easily from 1.5L to 2L or vice versa, allowing drivers on a limited budget to contest more than one class without having to buy a second car.

The resulting light-weight, off-set single seat voiturette cars achieved quite a reputation in shorter events such as hill-climbs, sprints, and time-trials.

Once again, Alta's keen pricing, in comparison to the expensive ERA models, resulted in many sales to amateur racers.

George Abecassis had some success with this design, winning a string of events before the Second World War interrupted.

As war approached, Taylor was drafting designs for a new straight-8 engine and a third-generation voiturette, this time with fully independent suspension.

Austerity limitations of raw materials did not stop Taylor beginning production of designs he had been developing throughout the war years, and the Alta GP car appeared in 1948.

He also restarted production of the road-going sports cars, although without further development funding the popularity of these models rapidly dwindled.

Kelly later carried out extensive modification and rebuilding work on GP3, running it as the Irish Racing Automobiles (IRA) car during 1952 and 1953.

Although according to Dennis Jenkinson's book Historic Racing Cars the uncompleted GP4 machine was converted and became F2/3 this was not correct and chassis GP4 was sold to Bobbie Baird in Ireland and eventually became a Jaguar engined 2 seater sportscar.

F2/4 followed in construction and was sold to Orlando Simpson before Peter Whitehead placed an order for what was to become the last Alta car built: F2/5.

While the F2 engine might have been overwhelmed by the chassis' bulk, tweaks made by Peter Whitehead to the unit in his car showed that the design had tuning potential.

Peter Whitehead led the way by removing the engine from F2/5 and installing it into a Cooper T24 chassis, which he ran in the 1953 British Grand Prix.

HWM had, the previous year, scored what was Alta's only significant victory, when Lance Macklin won the 1952 BRDC International Trophy race at Silverstone.