Recommended Alvis speed 20 tyres
Alvis speed 20 tyres for a standard car as recommended by Longstone Tyres.
Longstone classic tyres recommend the 475/500x20 Firestone for the early Vintage Alvis speed 20 as they keep the steering light and aesthetically look very vintage. The original equipment for these cars was 525X20. However they tend to make 550X20 tyres these days which make the steering heavier.
Vintage Alvis Speed 20
The engine for the Speed 20 was based on the one used in the preceding Silver Eagle cars but heavily modifed to give 87 bhp. The chassis was new and lowered by making it a "double drop" type where the side rails go over the front and rear axles. A centralised lubrication system was fitted allowing oil to be provided to moving suspension parts through a maze of pipework. Both front and rear suspension used half-elliptic leaf springs and the brakes with 14 inch drums, mechanically operated. The four-speed manual gearbox was mounted in-unit with the engine.
The car could be fitted with a variety of coachwork. Standard bodies were a four-door saloon from coachbuilders Charlesworth or four-door tourer by Cross and Ellis, but some cars were supplied in chassis form and carried bodies by coachbuilders such as Vanden Plas.