The Model R 20 hp Tonneau is a motor vehicle from Stevens-Duryea, with rear wheel drive, a front mounted engine and a 2 door tourer body style.
The power is produced by a naturally aspirated engine of 3.5 litre capacity. This powerplant features side valve valve gear, 4 cylinder layout, and 2 valves per cylinder.
The engine supplies its power through to the wheels via a 3 speed manual gearbox.
It weighs a quoted 839 kg at the kerb.
Full specs