The impact-bumper years.
Why the bumpers changed
In 1972, the United States passed federal regulations requiring all new cars to withstand a 5 mph front and 2.5 mph rear impact without damage to safety-critical systems. Porsche responded by replacing the long-hood's slim chrome bumpers with energy-absorbing body-color units, supported by aluminum struts that compressed under load.
The result was visually distinct: thicker bumpers, accordion seams between bumper and body, the turn signals relocated into the bumper modules themselves. The narrow body remained, the silhouette remained, the engine remained behind the rear axle. But the front and rear had a different rhythm.
The G-body variants
- 911 (2.7) (1974-1977)
- Base car, 2.7 liter flat-six. Three trim levels: 911, 911S, Carrera. Available with the magnesium-cased 2.7 engine that was known for cracking under stress.
- 911 Carrera 3.0 (1976-1977 European)
- A Europe-only variant with the 3.0 liter engine borrowed from the 930 Turbo (without the turbo). The bridge between the 2.7 Carreras and the 911 SC.
- 911 SC (1978-1983)
- Super Carrera. Single chassis variant — Porsche simplified the lineup down to one model. 3.0 liter, 180 hp initially, climbing to 204 by 1983. The 911 SC is widely considered the most reliable air-cooled 911 ever built.
- 911 Carrera 3.2 (1984-1989)
- The production high-water mark of the G-body. 3.2 liter, 231 hp. Bosch Motronic fuel injection. The Carrera 3.2 was offered in coupe, Targa, and cabriolet, with optional 16-inch Fuchs forged wheels and the M491 "Turbo body" option that gave a coupe the widened arches of a 930 without the turbo motor.
What changed underneath
Through the G-body era, Porsche developed and refined what would become known as the air-cooled flat-six's mature form. Mechanical fuel injection gave way to Bosch K-Jetronic, then to Motronic with electronic engine management. The 915 gearbox of the early G-body was replaced by the G50 in 1987 — a smoother, more durable five-speed that became a hallmark of the late-era cars.
Suspension was largely unchanged from the long-hood era: MacPherson struts up front, semi-trailing arms with torsion bars at the rear. The chassis would not get coil springs until the 964 in 1989.
Why this era matters
The G-body 911 is the bodyshell most enthusiasts grew up with. Sixteen model years of essentially the same car, with progressive refinement underneath. The 911 SC and 3.2 Carrera are now the entry point into 911 ownership for many buyers — robust, simpler than the 964 and 993, and unmistakably air-cooled.
The G-body also bookends what some call the "analog" era of the 911: before power steering, before ABS, before traction control. Everything the car does is filtered through the driver. That is the appeal.