2003 Alfa Romeo 156 vs. 2004 Mercedes-Benz SL
To start off, 2004 Mercedes-Benz SL is newer by 1 year(s). Which means there will be less support and parts availability for 2003 Alfa Romeo 156. In addition, the cost of maintenance, including insurance, on 2003 Alfa Romeo 156 would be higher. At 5,439 cc (12 cylinders), 2004 Mercedes-Benz SL is equipped with a bigger engine. In terms of performance, 2004 Mercedes-Benz SL (493 HP @ 4200 RPM) has 380 more horse power than 2003 Alfa Romeo 156. (113 HP @ 4000 RPM) In normal driving conditions, 2004 Mercedes-Benz SL should accelerate faster than 2003 Alfa Romeo 156. With that said, vehicle weight also plays an important factor in acceleration. 2004 Mercedes-Benz SL weights approximately 704 kg more than 2003 Alfa Romeo 156. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2004 Mercedes-Benz SL is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 2004 Mercedes-Benz SL. However, in wet, icy, snow, or gravel driving conditions, 2003 Alfa Romeo 156, being front wheel drive (FWD), will offer much better control with better grip. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 2004 Mercedes-Benz SL (800 Nm) has 525 more torque (in Nm) than 2003 Alfa Romeo 156. (275 Nm). This means 2004 Mercedes-Benz SL will have an easier job in driving up hills or pulling heavy equipment than 2003 Alfa Romeo 156.
Compare all specifications:
| 2003 Alfa Romeo 156 | 2004 Mercedes-Benz SL | |
| Make | Alfa Romeo | Mercedes-Benz |
| Model | 156 | SL |
| Year Released | 2003 | 2004 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 1970 cc | 5439 cc |
| Engine Cylinders | 4 cylinders | 12 cylinders |
| Engine Type | in-line | V |
| Horse Power | 113 HP | 493 HP |
| Engine RPM | 4000 RPM | 4200 RPM |
| Torque | 275 Nm | 800 Nm |
| Engine Bore Size | 82 mm | 82.1 mm |
| Engine Stroke Size | 90.4 mm | 87 mm |
| Engine Compression Ratio | 18.5:1 | 9.0:1 |
| Drive Type | Front | Rear |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1305 kg | 2009 kg |
| Vehicle Length | 4440 mm | 4540 mm |
| Vehicle Width | 1750 mm | 1840 mm |
| Vehicle Height | 1440 mm | 1300 mm |
| Wheelbase Size | 2600 mm | 2570 mm |
| Fuel Consumption | 4.9 L/100km | 12.4 L/100km |
| Fuel Consumption City | 8 L/100km | 18.1 L/100km |
| Fuel Tank Capacity | 63 L | 80 L |
