1987 BMW 750 vs. 2004 BMW 645
To start off, 2004 BMW 645 is newer by 17 year(s). Which means there will be less support and parts availability for 1987 BMW 750. In addition, the cost of maintenance, including insurance, on 1987 BMW 750 would be higher. At 4,986 cc (12 cylinders), 1987 BMW 750 is equipped with a bigger engine. In terms of performance, 2004 BMW 645 (328 HP @ 6100 RPM) has 32 more horse power than 1987 BMW 750. (296 HP @ 5200 RPM) In normal driving conditions, 2004 BMW 645 should accelerate faster than 1987 BMW 750. With that said, vehicle weight also plays an important factor in acceleration. 1987 BMW 750 weights approximately 170 kg more than 2004 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, 1987 BMW 750 (451 Nm @ 3900 RPM) has 1 more torque (in Nm) than 2004 BMW 645. (450 Nm @ 3600 RPM). This means 1987 BMW 750 will have an easier job in driving up hills or pulling heavy equipment than 2004 BMW 645.
Compare all specifications:
| 1987 BMW 750 | 2004 BMW 645 | |
| Make | BMW | BMW |
| Model | 750 | 645 |
| Year Released | 1987 | 2004 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4986 cc | 4398 cc |
| Engine Cylinders | 12 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 296 HP | 328 HP |
| Engine RPM | 5200 RPM | 6100 RPM |
| Torque | 451 Nm | 450 Nm |
| Torque RPM | 3900 RPM | 3600 RPM |
| Engine Bore Size | 84 mm | 92 mm |
| Engine Stroke Size | 75 mm | 82.7 mm |
| Fuel Type | Gasoline | Gasoline - Premium |
| Top Speed | 242 km/hour | 250 km/hour |
| Acceleration 0-100mph | 8.4 seconds | 5.6 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1860 kg | 1690 kg |
| Vehicle Length | 5030 mm | 4830 mm |
| Vehicle Width | 1850 mm | 1860 mm |
| Vehicle Height | 1420 mm | 1380 mm |
| Wheelbase Size | 2950 mm | 2830 mm |
| Fuel Tank Capacity | 120 L | 70 L |
