This inline engine configuration is the most common in cars with a displacement up to 2.4 L . The usual `` practical '' limit of the displacement of inline-four engines in a car is around 2.7 L . However , Porsche used a 3.0 L four in its 944 S2 and 968 sports cars , the International Harvester Scout was available with a 3.2 L inline four from 1965 until 1980 and Rolls-Royce produced several inline-four engines of 2,838 cc with basic cylinder dimensions of 3.5 in ( 89 mm ) diameter and 4.5 in ( 110 mm ) stroke ( Rolls-Royce B40 ) .
This inline-four gasoline configuration is the most common in cars with a displacement ( engine size ) up to 2.4 L. Porsche used a 3.0 L four in its 944 S2 and 968 sports cars .