the junior Formula Two category. The engine produced was a 1970 cc inline 4-cylinder, naturally aspirated unit, developing around . Unfortunately, Alta's own chassis design followed the preceding GP car very closely, and this resulted in an overweight car considering the greatly reduced power available from the unsupercharged motors. Tony Gaze and Gordon Watson took F2/1 and F2/2 on a tour of European races, but good results were hard to come by. 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. It competed in this form and still exists as a Jaguar 2 seater sportscar. F2/3 was no more successful than its siblings. 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. This F2 Alta was entered for World Championship Grands Prix events, first driven by himself in the 1952 French Grand Prix, and then by his half-brother Graham Whitehead at the 1952 British Grand Prix. Neither run produced a points finish, but this was not to be the last time that the Alta name appeared in Formula One. Alta the engine supplier 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. Alta engines had already been used by the HWM team since 1949, and from 1953 many more mechanics would come to know the Taylor-designed power plant. 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. Also present at Silverstone that day were no fewer than four Alta-powered HWM cars. 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. Over the next few years 1.5L and 2.5L Alta engines would find their way into many British-built F1 hopefuls, the most successful of which were Connaught and Cooper. Ultimately the engine would prove to be capable of approximately . With the collapse of Connaught in 1959, the Alta name disappeared from Formula One for good.