1971: Power play is the name of the game.Now power play is really the name of the game: Starting in September, the six-cylinder featured in the 911 grows once again, displacing 2341 cc and introducing anew power and performance league once again: 911 T (130 bhp/96 kW), 911 E(165 bhp/121 kW), 911 S (190 bhp/140 kW). Porsche also puts on the pressure with its "small" model, building 11 916 sports cars featuring the ultra-powerful six-cylinder (2341 cc, 190 bhp/140 kW), following the two914/8 models with an 8-cylinder racing engine already built two years before (2997 cc, but varying in power: 260 bhp/191 kW and 300 bhp/221 kW).The 260-bhp 914/8 goes to Professor Ferry Porsche for his 50th birthday.
1972: The Porsche 911Carrera RS 2.7 (2687 cc, 210 bhp/154 kW) and the Porsche 2.8 Carrera RSR(2806 cc, 300 bhp/ 221 kW) pave the way for further growth. Destined mainly for motor racing, these new models introduce a clearly visible aerodynamic body feature for the first time: the ducktail rear spoiler on the engine compartment lid. The Porsche 914 receives extra power, now featuring a larger four-cylinder from VW (1971 cc, 100 bhp/74 kW) helping the "small" Porsche to remain a genuine best seller.
1973: Following the plant shut-down in summer the new model range reveals significant modifications in body design, the bumpers now complying with US regulations and featuring impact absorbers at either side. The 2.7-litre power unit(210 bhp/154 kW) is introduced as standard in the Porsche 911. New models are the Carrera RS 3.0 sports version (2994 cc, 230 bhp/168 kW) and the Carrera RSR 3.0 (2994 cc, 330 bhp/241 kW) featuring a large rear wing and flared wheel arches with special air intakes .Within the 914series a 1.8-litre version (1795 cc, 85 bhp/63 kW) replaces former1.7-litre engine.
1974: In autumn the first Porsche Turbo code-named the 930 (2994 cc, 260 bhp/191 kW) sees the light of day, providing the foundation for various racing models code-named the 935 in the years to follow, with maximum output up to 850 bhp. The 911is available in three versions with the same 2687-cc displacement engine but different levels of power: 911 (150 bhp/110 kW), 911 S (175 bhp/129 kW)and the Carrera (210 bhp/154 kW). The sales split is almost exactly 50:50.
1975: The Porsche 911enters the 1976 model year with only very minor modifications. Output of the "basic" version is boosted to 165 bhp/121 kW, the 911 S is dropped from the range. The Carrera 3.0 (2994 cc, 200 bhp/147 kW) is dropped after the plant shut-down in summer. In their last year of production, all models in the Porsche 914 range receive a two-liter power unit, with a reduction in compression and output to 95 bhp/70 kW. In autumn the 912 E (available only in the USA) also featuring a VW power unit (1971 cc, 90 bhp/66 kW) joins the 914 in the market.
1976: Porsche's new entry-level model is the 924, the first-ever Porsche with a water-cooled engine fitted up front - an engine supplied by Audi (1984 cc, 125bhp/92 kW). The 911 model range continues with a 2.7-litre power unit as well as the 3.0-litre in the Carrera, output remaining unchanged in both cases. The body shell hot-galvanized on both sides significantly extends the life-cycle of all Porsche models as of the 1976 model year.
1977: The Porsche 928 launched in autumn 1977 is the new top model conceived as the successor to the 911. Its V8 power unit boasts American dimensions (4474 cc, 240 bhp/177kW). Starting in autumn, all models in the 911 range receive the 3.0-litreengine with the same output (180 bhp/132 kW) no longer comparable to the former performance figures due to the new emission standards in the market. The Turbo engine becomes larger and even more powerful (3299 cc, 300bhp/221 kW). Sales of the 924 remain at a good level, the 911 is a stable performer as before, and demand for the Turbo as well as the 928 continues to develop positively. From now on the 911 bears the model name "Porsche911 SC".
1978: The 928 becomes the first and so far only sports car in the world to be voted Car of the year
1979: Output of the911 increases slightly to 188 bhp/138 kW. The 924 Turbo also comes close to this figure, at 170 bhp/125 kW. With its technical features remaining unchanged, the 928 sees an increase in production and sales, the 924remaining Porsche's best seller.