Acura have really done their best to pack as much new technology as possible into the 2019 RDX. That starts with the engine and drivetrain. Acura have ditched the old V6 from the previous generation RDX in favor of a smaller 4-cylinder engine aided by a turbocharger. The immediate benefit of such a change is fuel economy. The new RDX should be about 11 percent more efficient than the vehicle it replaces, which will save owners money at the pump while also being better for the environment. Other benefits of downsizing the engine include a better weight distribution for this year's RDX, which goes a long way towards explaining why it handles so well.