New Vehicles With Three-cylinder Engines Available in 2021 Published on May 27, 2021 in Galleries by Guillaume Rivard Photo: Karma 2021 Karma Revero GTThe Karma Revero GT is a plug-in hybrid luxury sports car with a 1.5-litre three-cylinder engine (228 hp) mated to electric motors for a total of 536 hp and zero-emission range of 129 km.