1986 Alfa Romeo 75 vs. 2008 BMW 645
To start off, 2008 BMW 645 is newer by 22 year(s). Which means there will be less support and parts availability for 1986 Alfa Romeo 75. In addition, the cost of maintenance, including insurance, on 1986 Alfa Romeo 75 would be higher. At 4,398 cc (8 cylinders), 2008 BMW 645 is equipped with a bigger engine. In terms of performance, 2008 BMW 645 (328 HP @ 6100 RPM) has 175 more horse power than 1986 Alfa Romeo 75. (153 HP @ 5500 RPM) In normal driving conditions, 2008 BMW 645 should accelerate faster than 1986 Alfa Romeo 75. With that said, vehicle weight also plays an important factor in acceleration. 2008 BMW 645 weights approximately 530 kg more than 1986 Alfa Romeo 75. 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, 2008 BMW 645 (450 Nm @ 3600 RPM) has 244 more torque (in Nm) than 1986 Alfa Romeo 75. (206 Nm @ 3200 RPM). This means 2008 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 1986 Alfa Romeo 75.
Compare all specifications:
| 1986 Alfa Romeo 75 | 2008 BMW 645 | |
| Make | Alfa Romeo | BMW |
| Model | 75 | 645 |
| Year Released | 1986 | 2008 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2393 cc | 4398 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Horse Power | 153 HP | 328 HP |
| Engine RPM | 5500 RPM | 6100 RPM |
| Torque | 206 Nm | 450 Nm |
| Torque RPM | 3200 RPM | 3600 RPM |
| Engine Bore Size | 88 mm | 92.1 mm |
| Engine Stroke Size | 68.3 mm | 82.7 mm |
| Engine Compression Ratio | 9.0:1 | 10.0:1 |
| Acceleration 0-100mph | 9 seconds | 5.6 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1160 kg | 1690 kg |
| Vehicle Length | 4340 mm | 4830 mm |
| Vehicle Width | 1640 mm | 1860 mm |
| Vehicle Height | 1360 mm | 1380 mm |
| Wheelbase Size | 2460 mm | 2790 mm |
| Fuel Tank Capacity | 68 L | 70 L |
