2009 Mercedes-Benz SL-Class SL550
The 2009 Mercedes-Benz SL-Class SL550 is a 382-hp 5.5-liter V8 with a 7g-tronic 7-speed automatic and rear-wheel drive.
| Spec | Value |
|---|---|
| Engine | |
| Engine Type | Naturally Aspirated V8 |
| Displacement | 5.46 L |
| Horsepower | 382 hp @ 6,000 rpm |
| Torque | 391 lb-ft @ 2800-4800 rpm |
| Redline | 6,500 rpm |
| Valvetrain | DOHC, 4 valves/cylinder |
| Bore and Stroke | 97.0 x 84.0 |
| Compression Ratio | 10.7:1 |
| Injection Type | Sequential fuel injection with continuously variable valve timing |
| Drivetrain | |
| Drive Type | Rear-Wheel Drive |
| Transmission | |
| Transmission | 7G-TRONIC 7-speed automatic |
| 1st Gear | 4.38 (43 mph **) |
| 2nd Gear | 2.86 (66 mph **) |
| 3rd Gear | 1.92 (98 mph **) |
| 4th Gear | 1.37 (138 mph **) |
| 5th Gear | 1 (189 mph **) |
| 6th Gear | 0.82 (230 mph **) |
| 7th Gear | 0.73 (258 mph **) |
| Reverse | 3.42 |
| Final Drive | 2.65 |
| Suspension | |
| Front Suspension | 4-link double control arm front + 5-link rear, gas shocks, coil springs in series with hydraulic cylinders (ABC active) |
| Rear Suspension | 5-link independent, gas shocks, coil springs (ABC active) |
| Turning Diameter | 36.2 ft |
| Brakes | |
| Front Brake Disc | 13.8 in / 350.5 mm dia × 1.26 in thick, ventilated |
| Rear Brake Disc | 12.6 in / 320 mm dia × 0.94 in thick, solid |
| Tires & Wheels | |
| Wheels Front | 8.5 x 18 in |
| Wheels Rear | 9.5 x 18 in |
| Tires Front | 255/40 R18 |
| Tires Rear | 285/35 R18 |
| Dimensions & Weight | |
| Length | 178.5 in |
| Width | 81.4 in |
| Height | 51.1 in |
| Wheelbase | 100.8 in |
| Front Track | 61.4 in |
| Rear Track | 60.5 in |
| Interior | |
| Headroom Front | 37.7 in |
| Legroom Front | 42.9 in |
| Shoulder Room Front | 54 in |
** Theoretical max speed per gear at redline