Alvis Speed 25 racecar, bodytype two seater sports, no doors and convertible top. Built on firefly chassis (1935), wheelbase 2.616 mm, track  1.219 mm. Speed 25 engine, capacity 3710 cc,  160 hp. Gearbox  alvis four speed, all synchro-mesh.  Top speed 100 mph. Three different wheel sets, optional roll bar by Wiechers. Engine complet rebuilt in 2..