The base model Porsche 911, along with the 2.7 Liter 911S and Carrera 2.7, was introduced for the 1974 model year with many significant changes to meet legislative requirements around the world for both impact safety and emissions. It was available in Coupe and Targa variants, sporting engine Type 911/92 with K-Jetronic fuel injection, rated at 150 hp. For the 1975, the base model was discontinued in North America. ROW got Coupe and Targa variants, featuring engine Type 911/41 rated at 150 hp.
In 1974, Porsche's performance version of the 911 was simply known as the 911 Carrera. It had new bumpers that complied to American regulations and the 2.7-liter engine from the Carrera RS 2.7. Other new features for 1974 included new seats, a full-width rear taillight. The Carrera deleted all the chrome off the car in favor of black window frames, wipers, doorhandles, but chrome could be ordered as an option. In 1976 Porsche replaced the Carrera with a new 3.0 liter variant.
In 1974 Porsche offered a high performance fuel injected Carrera specifically for the European market. These were close to 2.7 RS specification and are often referred to as the 2.7 or Euro Carrera. In many regards, this car is similar to the 1973 2.7 RS in touring trim, with its 210bhp 911/83 engine, but the 2.7 Carrera is based on the updated G-series body and interior. Later Carreras that reach American shores used had reduced power and throttle response compared to Euro counterparts.
As a successor to the Carrera 2.7 MFI, the Carrera 3.0 was fitted with a variation of the 930's engine without a Turbo. During its production period only 3,687 cars were made. The Carrera 3.0 was replaced by the Porsche 911 SC for model year 1978. Between 1976 and 1977, Porsche introduced the Carrera 3.0 with wide rear flares, optional whale-tail, and other luxury options. Built before the ‘911 SC’ it has everything the SC has, and more. It’s a different drive with more power @200bhp; more torque @188 ft/lb @4200rpm and it was 10% lighter too.
The replacement for the SC series came in 1984 as the 911 3.2 Carrera, reviving the Carrera name for the first time since 1977. This was the last iteration in the original 911 series, with all subsequent models featuring new body styling and new brake, electronic, and suspension technologies. Almost the same galvanised body as the SC. Engine was claimed to be 80 per cent new, and the first production 911 to feature an ECU to control the ignition and fuel systems.
Production of the second generation 911 started in August 1973. The 1974 model year G-series derivative replaced the outgoing 1973 model year F-series. Visually, the new 911 was given a major facelift and all three production variants now came with fuel-injected 2.7-litre engines. The entry level 911 had 150bhp, the mid-range 911 S offered 175bhp and the flagship 911 Carrera came with 210bhp. Once again, customers were given the choice of either Coupe or Targa body styles.
The 911 SC effectively replaced the 911 S and was one of Porsche's first models that was meant for the international market. It was sold as a cheaper alternative to the 911 Turbo. The SC used an unblown version the 930 Turbo unit that offered 180 to 200 bhp depending on model year. Options included the rear whale tail, front chin spoiler, Bilstein dampers, 16 inch wheels with Pirelli P7 tires and sports seats. Sometimes dealers lumped these options together to create their own sport package. It was available as a Coupe and Targa from 1978 - 1983, while the Cabriolet version was only available in 1983.
The 911 Turbo was put into production in 1975. While the original purpose of the 911 Turbo was to gain homologation for the 1976 racing season, it quickly became popular among car enthusiasts. Ernst Fuhrmann adapted the turbo-technology originally developed for the 917/30 CAN-AM car and applied it to the 3.0 litre flat-six used in the Carrera RS 3.0, thus creating what Porsche internally dubbed as the 930. Total power output from the engine was 260 bhp and 254 ft lbs of torque.
Porsche made its first and most significant changes to the 930 for 1978 model year, enlarging the engine bore by 2 mm (0.08 in) to a total displacement of 3,299 cc (3.3 L; 201.3 cu in) and adding an air-to-air intercooler. The suspension benefitted from new anti-roll bars, firmer shocks and larger diameter rear torsion bars. While the increase in displacement increased power output and torque, it also increased the weight of the vehicle, which contributed to a substantial change in the handling and character of the car compared to the Earlier 3.0-Litre Models.
Also produced for the 1976 "model year", for the U.S. market, was the 912E, a 4-cylinder version of the 911 like the 912 that had last been produced in 1969. It used the I-series chassis and the 2.0 Volkswagen engine from the Porsche 914. In all, 2092 units were produced. In 1976, the Porsche 924 took this car's place for the 1977 "model year" and beyond. The power was supplied by a 4-cylinder high-performance fuel injection motor also used in the Volkswagen 411.