Comparison Porsche 911 Cabriolet (991 II) Turbo 3.8 (540 Hp) PDK & Audi S4 Avant (B9) 3.0 TFSI V6 (354 Hp) quattro Tiptronic
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| Brand: | Porsche | Audi |
| Model: | 911 | S4 |
| Generation: | 911 Cabriolet (991 II) | S4 Avant (B9) |
| Engine / modification: | Turbo 3.8 (540 Hp) PDK | 3.0 TFSI V6 (354 Hp) quattro Tiptronic |
| Production start: | 2015 year | 2016 year |
| Production end: | 2018 year | |
| Coupe type: | Cabriolet | Combi |
| Num. of Doors: | 2 | 5 |
| Num. of seats: | 2+2 | 5 |
| Fuel consumption / economy - urban: | 12.1 l/100 km | 10.0-10.1 l/100 km |
| Fuel consumption / economy - extra urban: | 7.6 l/100 km | 6.1-6.3 l/100 km |
| Fuel consumption / economy - combined: | 9.3 l/100 km | 7.5-7.6 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.32 | 0.31 |
| Fuel tank volume: | 68 l | 58 l |
| Emission standard: | Euro 6 | EURO VI |
| CO2 emissions: | 216 g/km | 171-175 g/km |
| Power: | 540 hp | 354 hp |
| Max power in: | 6400 rpm. | 5400-6400 rpm. |
| Maximum speed: | 320 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 3.1 sec | 4.9 sec |
| Torque: | 710 Nm @ 2250-4000 rpm. | 500 Nm/1370-4500 rpm. |
| Model Engine: | MDA.BA | |
| Engine position: | Rear, longitudinal | Front, longitudinal |
| Engine displacement: | 3800 cm3 | 2995 cm3 |
| Engine oil capacity: | 7.5 l | |
| Fuel System: | Direct injection | Direct injection |
| Aspiration / Turbine: | BiTurbo | Turbocharging |
| Position of cylinders: | Boxer | V engine |
| Valvetrain: | DOHC | |
| Number of cylinders: | 6 | 6 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 9.8 | 11.2 |
| Piston Stroke: | 77.5 mm | 89 mm |
| Cylinder Bore: | 102 mm | 84.5 mm |
| Wheel Drive: | All wheel drive (4x4) | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 7 PDK | 8 tiptronic |
| Length: | 4507 mm | 4745 mm |
| Width: | 1880 mm | 1842 mm |
| Width including mirrors: | 1978 mm | 2022 mm |
| Height: | 1294 mm | 1411-1437 mm |
| Wheelbase: | 2450 mm | 2825 mm |
| Front track: | 1541 mm | 1565 mm |
| Rear (Back) track: | 1590 mm | 1546 mm |
| Front overhang: | 887 mm | |
| Rear overhang: | 1033 mm | |
| Minimum volume of Luggage (trunk): | 115 l | 505 l |
| Maximum amount of Luggage (trunk): | 160 l | 1510 l |
| Front suspension: | Independent type McPherson | Multi-link suspension |
| Rear suspension: | Multi-link independent | Multi-link independent |
| Max weight: | 2065 kg | 2265 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Disc |
| Kerb Weight: | 1665 kg | 1675 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | |
| Max. roof load: | 90 kg | |
| Permitted trailer load with brakes (8%): | 2100 kg | |
| Minimum turning circle (turning diameter): | 11.6 m | |
| Permitted trailer load with brakes (12%): | 1900 kg | |
| Permitted trailer load without brakes: | 750 kg | |
| Permitted towbar download: | 80 kg | |
| Tire size: | 245/35 ZR 20; 305/30 ZR 20 | 245/40 R18 |
| Wheel rims size: | 9J x 20; 11.5J x 20 | R18 |