1986 Alfa Romeo 75 vs. 2003 BMW 645
To start off, 2003 BMW 645 is newer by 17 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), 2003 BMW 645 is equipped with a bigger engine. In terms of performance, 2003 BMW 645 (321 HP @ 6100 RPM) has 156 more horse power than 1986 Alfa Romeo 75. (165 HP @ 5800 RPM) In normal driving conditions, 2003 BMW 645 should accelerate faster than 1986 Alfa Romeo 75. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW 645 weights approximately 653 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. 2003 BMW 645 has automatic transmission and 1986 Alfa Romeo 75 has manual transmission. 1986 Alfa Romeo 75 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2003 BMW 645 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1986 Alfa Romeo 75 | 2003 BMW 645 | |
| Make | Alfa Romeo | BMW |
| Model | 75 | 645 |
| Year Released | 1986 | 2003 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 1779 cc | 4398 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 165 HP | 321 HP |
| Engine RPM | 5800 RPM | 6100 RPM |
| Engine Bore Size | 80 mm | 92 mm |
| Engine Stroke Size | 88.5 mm | 82.7 mm |
| Top Speed | 212 km/hour | 250 km/hour |
| Acceleration 0-100mph | 7.6 seconds | 6.2 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1242 kg | 1895 kg |
| Vehicle Length | 4430 mm | 4830 mm |
| Vehicle Width | 1640 mm | 1860 mm |
| Vehicle Height | 1360 mm | 1380 mm |
| Wheelbase Size | 2520 mm | 2790 mm |
| Fuel Tank Capacity | 49 L | 70 L |
