1979 Mercedes-Benz 500 vs. 2005 BMW 645
To start off, 2005 BMW 645 is newer by 26 year(s). Which means there will be less support and parts availability for 1979 Mercedes-Benz 500. In addition, the cost of maintenance, including insurance, on 1979 Mercedes-Benz 500 would be higher. At 4,973 cc (8 cylinders), 1979 Mercedes-Benz 500 is equipped with a bigger engine. In terms of performance, 2005 BMW 645 (338 HP @ 6100 RPM) has 98 more horse power than 1979 Mercedes-Benz 500. (240 HP @ 4750 RPM) In normal driving conditions, 2005 BMW 645 should accelerate faster than 1979 Mercedes-Benz 500. With that said, vehicle weight also plays an important factor in acceleration. 2005 BMW 645 weights approximately 95 kg more than 1979 Mercedes-Benz 500. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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, 2005 BMW 645 (439 Nm @ 3600 RPM) has 38 more torque (in Nm) than 1979 Mercedes-Benz 500. (401 Nm @ 3200 RPM). This means 2005 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 1979 Mercedes-Benz 500.
Compare all specifications:
| 1979 Mercedes-Benz 500 | 2005 BMW 645 | |
| Make | Mercedes-Benz | BMW |
| Model | 500 | 645 |
| Year Released | 1979 | 2005 |
| Engine Position | Front | Front |
| Engine Size | 4973 cc | 4390 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Horse Power | 240 HP | 338 HP |
| Engine RPM | 4750 RPM | 6100 RPM |
| Torque | 401 Nm | 439 Nm |
| Torque RPM | 3200 RPM | 3600 RPM |
| Engine Compression Ratio | 8.8:1 | 10.5:1 |
| Top Speed | 228 km/hour | 250 km/hour |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1620 kg | 1715 kg |
| Vehicle Length | 5000 mm | 4830 mm |
| Vehicle Width | 1830 mm | 1860 mm |
| Vehicle Height | 1440 mm | 1380 mm |
| Wheelbase Size | 2940 mm | 2790 mm |
| Fuel Tank Capacity | 90 L | 70 L |
