Comparison Mercedes-Benz S-class (W221, facelift 2009) S 350 (272 Hp) G-TRONIC & Cadillac ATS Sedan 3.6 V6 (340 Hp) Automatic & Cadillac ATS Coupe 2.0 (276 Hp) AWD
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| Brand: | Mercedes-Benz | Cadillac | Cadillac |
| Model: | S-class | ATS | ATS |
| Generation: | S-class (W221, facelift 2009) | ATS Sedan | ATS Coupe |
| Engine / modification: | S 350 (272 Hp) G-TRONIC | 3.6 V6 (340 Hp) Automatic | 2.0 (276 Hp) AWD |
| Production start: | 2009 year | 2013 year | 2015 year |
| Production end: | 2011 year | ||
| Coupe type: | Sedan | Sedan | Coupe |
| Num. of Doors: | 4 | 4 | 2 |
| Num. of seats: | 5 | 5 | 4 |
| Fuel consumption / economy - urban: | 14.6-14.8 l/100 km | 11.8 l/100 km | 12.3 l/100 km |
| Fuel consumption / economy - extra urban: | 7.4-7.7 l/100 km | 7.8 l/100 km | 6.7 l/100 km |
| Fuel consumption / economy - combined: | 10-10.2 l/100 km | 9.8 l/100 km | 8.8 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.30 | 0.29 | |
| Fuel tank volume: | 90 l | 60.5 l | 60.5 l |
| CO2 emissions: | 234-237 g/km | 203 g/km | |
| Power: | 272 hp | 340 hp | 276 hp |
| Max power in: | 6000 rpm. | 6800 rpm. | 5500 rpm. |
| Maximum speed: | 250 km/h | ||
| Acceleration from 0 to 100 km/h: | 7.3 sec | 6.2 sec | |
| Torque: | 350 Nm @ 2400-5000 rpm. | 386 Nm @ 5300 rpm. | 400 Nm @ 3000-4600 rpm. |
| Model Engine: | M 272.965 | LGX | LTG |
| Engine position: | Front, longitudinal | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 3498 cm3 | 3640 cm3 | 1998 cm3 |
| Engine oil capacity: | 8.0 l | 5.7 l | 5.7 l |
| Coolant: | 10.2 l | 7.6 l | |
| Fuel System: | Multi-point injection | Direct injection | Direct injection |
| Maximum engine speed: | 7200 rpm. | 7000 rpm. | |
| Aspiration / Turbine: | Turbocharging | ||
| Position of cylinders: | V engine | V engine | Inline |
| Valvetrain: | DOHC-VVT | DOHC-VVT | |
| Number of cylinders: | 6 | 6 | 4 |
| Number of valves per cylinder: | 4 | 4 | |
| Compression ratio: | 10.7 | 11.5 | 9.5 |
| Piston Stroke: | 85.6 mm | 86 mm | |
| Cylinder Bore: | 95 mm | 86 mm | |
| Wheel Drive: | Rear wheel drive | Rear wheel drive | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 7G-TRONIC | 8 Hydra-Matic | |
| Number of Gears (manual transmission): | 6 | ||
| Length: | 5096 mm | 4643 mm | 4663 mm |
| Width: | 1871 mm | 1805 mm | 1841 mm |
| Width including mirrors: | 2120 mm | ||
| Height: | 1479 mm | 1421 mm | 1392-1399 mm |
| Wheelbase: | 3035 mm | 2775 mm | 2775 mm |
| Front track: | 1600 mm | 1512 mm | 1532 mm |
| Rear (Back) track: | 1606 mm | 1548 mm | 1568 mm |
| Front overhang: | 888 mm | ||
| Rear overhang: | 1173 mm | ||
| Minimum volume of Luggage (trunk): | 560 l | 294 l | 295 l |
| Front suspension: | Independent, Spring McPherson, with stabilizer | Independent, Spring McPherson, with stabilizer | |
| Rear suspension: | Multi-link independent | Multi-link independent | |
| Max weight: | 2490 kg | 2050 kg | |
| Front brakes: | Disc | Ventilated discs | Ventilated discs |
| Rear brakes: | Disc | Ventilated discs | Ventilated discs |
| Kerb Weight: | 1820 kg | 1570 kg | |
| ABS: | yes | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | Electric Steering | |
| Minimum turning circle (turning diameter): | 11.8 m | 10.97 m | 11.6 m |
| Permitted trailer load without brakes: | 454 kg | 454 kg | |
| Tire size: | 235/55 R17 | 225/45 R17; 225/40 R18 | 225/40 R18; 255/35 R18 |
| Wheel rims size: | R17 | 8J x 17; 8J x 18; 9J x 18 | 8J x 18; 9J x 18 |