Finally, the 2.0-litre, four-cylinder, air-restricted racing engines – in Europe, the mainstays have been Spiess (formerly badged as Volkswagen in the old European F3 days) and HWA (Mercedes ...

This trike packs a turbo version of the standard F3's 1,330cc three-cylinder Rotax engine with 150 horsepower and 137 pound-feet of torque. Those are useful upgrades over the stock machine's 115 ...