The 1972–1973 model years consisted of the same models of 911— the entry level T, the midrange E and the top-of-the-line S. However, all models got a new, larger 2,341 cc (2.341 L; 142.9 cu in) engine. This is universally known as the “2.4L” engine, despite its displacement being closer to 2.3 litres— perhaps to emphasize the increase over the 2.2 L. The new power ratings for the T were 130 hp (97 kW), or 140 hp (104 kW) in the U.S., 165 hp (123 kW) for the E and 190 hp (142 kW) for the S. The 911E and 911S used mechanical fuel injection (MFI) in all markets. The 911T was carbureted, except in the United States where it also used MFI, which accounts for the 7 kW (9 hp) power difference between the two. In January 1973, U.S. 911Ts were transferred to the new K-Jetronic CIS (Continuous Fuel Injection) system from Bosch. These CIS-powered cars are usually referred to as “1973.5” models by enthusiasts.