Porsche 911 (991) Engine Numbers (All Years)

Porsche 911 (991) Engine Codes

There are more versions of the 991 Carrera than you can shake a stick at! A seemingly bewildering number of model versions of essentially the same car and confusing distinctions between them. The Carrera, 4, S, GTS, Targa, Cabriolet, 4 S Targa, 4 GTS, GTS Cabriolet etc. Rather reminds one of a scrambled Rubik’s Cube – there is a solution and it’s far easier than it looks. Let’s deal with the first 991 version – 2011 thru 2016 – one Carrera, multiple configurations. Engine wise, the Carrera models all had a naturally aspirated 3.4-liter flat-six engine with 345 hp. The Carrera S models got a 3.8-liter naturally aspirated flat-6 with 395 hp, while the GTS models also got a 3.8 liter, with 424 hp.

The biggest news with 911 engines during the 991 generation happened when we got the 991.2 generation cars. Gone was the naturally aspirated flat 6, replaced by 3.0 liter twin-turbocharged flat 6 across the board (other than GT cars). The 2981cc twin-turbocharged flat-six engine was the first forced induction unit ever to be fitted to a 911 Carrera. In the entry-level model it produced 365 bhp at 6500rpm and a strong 332lb ft of torque between 1700 and 5000rpm. That mid-range torque output gives the Carrera a vastly more muscular feel than the rather peaky normally aspirated engines of old. The same engine is used in the Carrera T with an unchanged power output. The Carrera S uses the same 3-litre unit, but with power lifted to 414 bhp at 6500 rpm, while torque is now rated at 369 lb ft between 1700 and 5000rpm.

The good news is that the GT3 and GT3 RS models both kept natural aspiration. The GT3 got a 3.8-litre unit that develops 469 bhp at 8250 rpm with 325 lb ft available at 6250rpm. The RS uses a longer stroke version of the same engine to displace 4-litres, with power at 493 bhp at 8250 rpm and torque to 339 lb ft at 6250rpm. The Turbo models are also more powerful than ever – 533bhp and 523 lb ft from 2250 to 4000rpm (on overboost) for the Turbo, while the Turbo S boasts 572bhp and 553lb ft (at the same engine speeds as the Turbo, also on overboost).