Comparison Mercedes-Benz SL Roadster (W121) 190 SL (105 Hp) & Audi A4 Avant (B9 8W, facelift 2020) 40 g-tron (170 Hp) S tronic & Audi A4 (B8 8K, facelift 2011) 2.0 TFSI (211 Hp) quattro S tronic
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| Brand: | Mercedes-Benz | Audi | Audi |
| Model: | SL | A4 | A4 |
| Generation: | SL Roadster (W121) | A4 Avant (B9 8W, facelift 2020) | A4 (B8 8K, facelift 2011) |
| Engine / modification: | 190 SL (105 Hp) | 40 g-tron (170 Hp) S tronic | 2.0 TFSI (211 Hp) quattro S tronic |
| Production start: | 1955 year | 2020 year | 2012 year |
| Production end: | 1963 year | 2013 year | |
| Coupe type: | Roadster | Sedan | |
| Num. of Doors: | 2 | 5 | 4 |
| Num. of seats: | 3 | 5 | 5 |
| Fuel consumption / economy - urban: | 8.8 l/100 km | ||
| Fuel consumption / economy - extra urban: | 5.8 l/100 km | ||
| Fuel consumption / economy - combined: | 8.6 l/100 km | 6.9 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol / CNG | Petrol (Gasoline) |
| Drag coefficient: | 0.28 | ||
| Fuel tank volume: | 65 l | 7 l | 61 l |
| Emission standard: | Euro 6d-ISC-FCM | Euro 5 | |
| CO2 emissions: | 159 g/km | ||
| Power: | 105 hp | 170 hp | 211 hp |
| Max power in: | 5700 rpm. | 4450-6000 rpm. | 4300-6000 rpm. |
| Maximum speed: | 173 km/h | 210 km/h | 245 km/h |
| Acceleration from 0 to 100 km/h: | 8.4 sec | 6.5 sec | |
| CO2 emissions (WLTP): | 121 g/km | ||
| Torque: | 142 Nm @ 3200 rpm. | 270 Nm @ 1650-4400 rpm. | 350 Nm @ 1500-4500 rpm. |
| Model Engine: | M 121 B II | CAEB, CDNC, CPMA | |
| Engine position: | Front, longitudinal | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 1897 cm3 | 1984 cm3 | 1984 cm3 |
| Engine oil capacity: | 4 l | 4.6 l | |
| Coolant: | 10 l | ||
| Fuel System: | Carburettor | Direct injection | Direct injection |
| Maximum engine speed: | 6000 rpm. | ||
| CNG cylinder capacity: | 17.3 kg | ||
| Aspiration / Turbine: | Turbo / Intercooler (Turbocharging / Intercooler) | ||
| Position of cylinders: | Inline | Inline | Inline |
| Valvetrain: | DOHC | ||
| Number of cylinders: | 4 | 4 | 4 |
| Number of valves per cylinder: | 2 | 4 | |
| Compression ratio: | 8.5 | 9.6 | |
| Piston Stroke: | 83.6 mm | 92.8 mm | |
| Cylinder Bore: | 85 mm | 82.5 mm | |
| Wheel Drive: | Rear wheel drive | Front wheel drive | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 7 S tronic | 7 S tronic | |
| Number of Gears (manual transmission): | 4 | ||
| Length: | 4220 mm | 4701 mm | |
| Width: | 1740 mm | 1826 mm | |
| Width including mirrors: | 2040 mm | ||
| Height: | 1320 mm | 1427 mm | |
| Wheelbase: | 2400 mm | 2808 mm | |
| Front track: | 1430 mm | 1564 mm | |
| Rear (Back) track: | 1470 mm | 1551 mm | |
| Ride height(clearance): | 155 mm | ||
| Front overhang: | 862 mm | ||
| Rear overhang: | 1031 mm | ||
| Minimum volume of Luggage (trunk): | 415 l | 480 l | |
| Maximum amount of Luggage (trunk): | 1415 l | 962 l | |
| Front suspension: | Double wishbone | Multi-link suspension | |
| Rear suspension: | dependent spring suspension | Independent, spring multi-link with stabilizer | Independent on trapezoidal lever |
| Max weight: | 1400 kg | 2140 kg | 2120 kg |
| Front brakes: | Drum | Ventilated discs | Ventilated discs |
| Rear brakes: | Drum | Disc | Disc |
| Kerb Weight: | 1140 kg | 1665 kg | 1570 kg |
| ABS: | yes | ||
| Steering type: | Steering rack and pinion | ||
| Power steering: | Electric Steering | Electric Steering | |
| Max. roof load: | 90 kg | 90 kg | |
| Permitted trailer load with brakes (8%): | 1700 kg | 1900 kg | |
| Minimum turning circle (turning diameter): | 11 m | 11.6 m | 11.5 m |
| Permitted trailer load with brakes (12%): | 1500 kg | ||
| Permitted trailer load without brakes: | 750 kg | 750 kg | |
| Permitted towbar download: | 80 kg | 80 kg | |
| Tire size: | 205/60 R16 | 225/55 R16 | |
| Wheel rims size: | R13 | 7J x 16 | 7.5J x R16 |