The Norton NRV588 is a model of British motorcycle manufactured by Norton Motorcycles between 1984 and 1988. It was based on the design of the earlier Commando 850, but featured an 8-valve rotary engine developed by Norton owner and engineer David Garside. The engine gave the NRV588 increased power and torque at lower rpm than the Commando, with a claimed maximum of 48 hp (36 kW) at 7500 rpm. The NRV588 was popularly known as the "Rotary Racer" for its association with the Isle of Man TT races, in which it achieved several podium finishes.