1991 Ford Sierra vs. 2005 Mercedes-Benz SL
To start off, 2005 Mercedes-Benz SL is newer by 14 year(s). Which means there will be less support and parts availability for 1991 Ford Sierra. In addition, the cost of maintenance, including insurance, on 1991 Ford Sierra would be higher. At 3,722 cc (6 cylinders), 2005 Mercedes-Benz SL is equipped with a bigger engine. In terms of performance, 2005 Mercedes-Benz SL (247 HP @ 5700 RPM) has 172 more horse power than 1991 Ford Sierra. (75 HP @ 4500 RPM) In normal driving conditions, 2005 Mercedes-Benz SL should accelerate faster than 1991 Ford Sierra. With that said, vehicle weight also plays an important factor in acceleration. 2005 Mercedes-Benz SL weights approximately 610 kg more than 1991 Ford Sierra. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2005 Mercedes-Benz SL (350 Nm @ 3000 RPM) has 198 more torque (in Nm) than 1991 Ford Sierra. (152 Nm @ 2200 RPM). This means 2005 Mercedes-Benz SL will have an easier job in driving up hills or pulling heavy equipment than 1991 Ford Sierra.
Compare all specifications:
| 1991 Ford Sierra | 2005 Mercedes-Benz SL | |
| Make | Ford | Mercedes-Benz |
| Model | Sierra | SL |
| Year Released | 1991 | 2005 |
| Engine Position | Front | Front |
| Engine Size | 1751 cc | 3722 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Horse Power | 75 HP | 247 HP |
| Engine RPM | 4500 RPM | 5700 RPM |
| Torque | 152 Nm | 350 Nm |
| Torque RPM | 2200 RPM | 3000 RPM |
| Engine Bore Size | 82.5 mm | 97 mm |
| Engine Stroke Size | 82 mm | 84 mm |
| Engine Compression Ratio | 21.5:1 | 10.0:1 |
| Fuel Type | Diesel | Gasoline - Premium |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1145 kg | 1755 kg |
| Vehicle Length | 4430 mm | 4540 mm |
| Vehicle Width | 1700 mm | 1820 mm |
| Vehicle Height | 1370 mm | 1300 mm |
| Wheelbase Size | 2620 mm | 2570 mm |
| Fuel Tank Capacity | 60 L | 80 L |
