In the top-of-the-range 911 Carrera RS, the 3.8-litre air-cooled flat engine achieved 221 kW (300 hp) without turbocharging. Further engines followed, all of which were air-cooled until the 911 Type 993. The air-cooled flat engine was also an ideal choice for sports cars such as the Porsche 911 as its low design lowered the car’s centre of gravity, giving a sportier and more dynamic style of driving. Its 1.1-litre, four-cylinder engine delivering 26 kW (35 hp) was installed by Ferry Porsche in his 356-001. GT3 RS 2dr Coupe (4.0L 6cyl 7AM) - $187,500 (Most Popular) Speedster 2dr Convertible (4.0L 6cyl 6M) - $274,500 Carrera 2dr Coupe (3.0L 6cyl Turbo 7M) - $91,100 Carrera 4S 2dr Coupe AWD (3.0L 6cyl Turbo 7M) - $112,000 Carrera GTS 2dr Coupe (3.0L 6cyl Turbo 7M) - $120,700 Targa 4 GTS 2dr Coupe AWD (3.0L 6cyl Turbo 7M) - $139,900 Turbo S 2dr Coupe AWD (3.8L 6cyl Turbo 7AM) - $190,700 Carrera S 2dr Convertible (3.0L 6cyl Turbo 7M) - $117,400 Turbo S 2dr Convertible AWD (3.8L 6cyl Turbo 7AM) - $203,000 Targa 4S 2dr Coupe AWD (3.0L 6cyl Turbo 7M) - $124,300 Carrera T 2dr Coupe (3.0L 6cyl Turbo 7M) - $102,100 Carrera 2dr Convertible (3.0L 6cyl Turbo 7M) - $103,400 Carrera 4 GTS 2dr Coupe AWD (3.0L 6cyl Turbo 7M) - $127,600 Carrera GTS 2dr Convertible (3.0L 6cyl Turbo 7M) - $133,000 Carrera S 2dr Coupe (3.0L 6cyl Turbo 7M) - $105,100 Carrera 4S 2dr Convertible AWD (3.0L 6cyl Turbo 7M) - $124,300 Turbo 2dr Coupe AWD (3.8L 6cyl Turbo 7AM) - $161,800 Turbo 2dr Convertible AWD (3.8L 6cyl Turbo 7AM) - $174,100 Carrera 4 GTS 2dr Convertible AWD (3.0L 6cyl Turbo 7M) - $139,900 Targa 4 2dr Coupe AWD (3.0L 6cyl Turbo 7M) - $110,300 Carrera 4 2dr Convertible AWD (3.0L 6cyl Turbo 7M) - $110,300 GT2 RS 2dr Coupe (3.8L 6cyl Turbo 7AM) - $293,200 Carrera 4 2dr Coupe AWD (3.0L 6cyl Turbo 7M) - $98,000 GT3 2dr Coupe (4.Carrera 4S 2dr Convertible AWD (3.0L 6cyl Turbo 7M) - $124,300 (Most Popular) Carrera 2dr Convertible (3.0L 6cyl Turbo 7M) - $103,400 Turbo 2dr Convertible AWD (3.8L 6cyl Turbo 7AM) - $174,100 Carrera 4 GTS 2dr Convertible AWD (3.0L 6cyl Turbo 7M) - $139,900 Carrera 2dr Coupe (3.0L 6cyl Turbo 7M) - $91,100 Turbo S 2dr Coupe AWD (3.8L 6cyl Turbo 7AM) - $190,700 Targa 4 2dr Coupe AWD (3.0L 6cyl Turbo 7M) - $110,300 Targa 4 GTS 2dr Coupe AWD (3.0L 6cyl Turbo 7M) - $139,900 Carrera 4 2dr Convertible AWD (3.0L 6cyl Turbo 7M) - $110,300 Carrera GTS 2dr Coupe (3.0L 6cyl Turbo 7M) - $120,700 Carrera 4 GTS 2dr Coupe AWD (3.0L 6cyl Turbo 7M) - $127,600 Carrera 4 2dr Coupe AWD (3.0L 6cyl Turbo 7M) - $98,000 Carrera S 2dr Convertible (3.0L 6cyl Turbo 7M) - $117,400 Carrera GTS 2dr Convertible (3.0L 6cyl Turbo 7M) - $133,000 Targa 4S 2dr Coupe AWD (3.0L 6cyl Turbo 7M) - $124,300 Turbo 2dr Coupe AWD (3.8L 6cyl Turbo 7AM) - $161,800 Carrera S 2dr Coupe (3.0L 6cyl Turbo 7M) - $105,100 GT3 2dr Coupe (4.0L 6cyl 7AM) - $143,600 Carrera 4S 2dr Coupe AWD (3.0L 6cyl Turbo 7M) - $112,000 Turbo S 2dr Convertible AWD (3.8L 6cyl Turbo 7AM) - $203,000 GT2 RS 2dr Coupe (3.8L 6cyl Turbo 7AM) - $293,200 Carrera T 2dr Coupe (3.0L 6cyl Turbo 7M) - $102,100 Turbo S Exclusive 2dr Coupe AWD (3. Porsche first joined the flat-engine fray when Ferry Porsche put a VW Beetle 1.1 litres, four-cylinder engine into his Porsche 356.