2006 BMW 645 vs. 1991 Mercedes-Benz 300
To start off, 2006 BMW 645 is newer by 15 year(s). Which means there will be less support and parts availability for 1991 Mercedes-Benz 300. In addition, the cost of maintenance, including insurance, on 1991 Mercedes-Benz 300 would be higher. At 4,398 cc (8 cylinders), 2006 BMW 645 is equipped with a bigger engine. In terms of performance, 2006 BMW 645 (328 HP @ 6100 RPM) has 97 more horse power than 1991 Mercedes-Benz 300. (231 HP @ 5800 RPM). In normal driving conditions, 2006 BMW 645 should accelerate faster than 1991 Mercedes-Benz 300. With that said, vehicle weight also plays an important factor in acceleration. 1991 Mercedes-Benz 300 weights approximately 208 kg more than 2006 BMW 645.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. 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, 2006 BMW 645 (450 Nm @ 3600 RPM) has 140 more torque (in Nm) than 1991 Mercedes-Benz 300. (310 Nm @ 4100 RPM). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 1991 Mercedes-Benz 300.
Compare all specifications:
| 2006 BMW 645 | 1991 Mercedes-Benz 300 | |
| Make | BMW | Mercedes-Benz |
| Model | 645 | 300 |
| Year Released | 2006 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 3199 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Horse Power | 328 HP | 231 HP |
| Engine RPM | 6100 RPM | 5800 RPM |
| Torque | 450 Nm | 310 Nm |
| Torque RPM | 3600 RPM | 4100 RPM |
| Engine Bore Size | 92 mm | 89.9 mm |
| Engine Stroke Size | 82.7 mm | 84 mm |
| Engine Compression Ratio | 10.0:1 | 10.0:1 |
| Top Speed | 250 km/hour | 230 km/hour |
| Acceleration 0-100mph | 5.6 seconds | 8.9 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1692 kg | 1900 kg |
| Vehicle Length | 4830 mm | 5220 mm |
| Vehicle Width | 1860 mm | 1890 mm |
| Vehicle Height | 1380 mm | 1500 mm |
| Wheelbase Size | 2790 mm | 3150 mm |
| Fuel Tank Capacity | 70 L | 100 L |
