The 1974 Carrera RS was built on the new short-bonnet G-series chassis, which incorporated a strengthened floor pan, front and rear impact bumpers, revised lighting, and other features to improve crash-worthiness demanded by the United States.

For reasons of economy, Porsche manufactured all-new 911s on the same chassis.

They also changed the engine specifications for the 1974 Carreras, which replaced the top-of-line 2.4-litre 911 S from the year before.

All Carreras received a new 2.7-litre engine with more durable Nikasil-coated cylinders.

Those destined for the U.S.

were fitted with the 175-horsepower Type 911/93 with K-Jetronic fuel injection, to meet strict emissions standards, whilst the rest of the world (RoW) received the Type 911/83 with Bosch mechanical fuel injection (MFI) from the hugely successful and popular 1973 Carrera RS 2.7.

This engine developed 210 horsepower at 6,300 rpm and 188 foot-pounds of torque at 5,100 rpm.