engine smoothness

Premium design elements give the engine smoothness and durability.

It improves engine smoothness and reliability, and it has virtually the same power output as petrol.

Engine smoothness (extensive article).

That car was indeed special, with extra care taken in assembly and with handpicked parts used under the hood to assure engine smoothness and durability.

EFI (electronic fuel-injection): a computer controls the fuel being supplied to the engine, this improves engine smoothness and economy.

In a car it would measure some basic indicator of performance, like engine smoothness, and continuously adjust each component in a random search for the ideal performance.

One of the benefits of the 7-bearing design is increased engine smoothness, though modem vibration dampers and other design considerations seldom let the older 4-main engines seem particularly obtrusive.