1991 Porsche 928 vs. 2008 BMW 630
To start off, 2008 BMW 630 is newer by 17 year(s). Which means there will be less support and parts availability for 1991 Porsche 928. In addition, the cost of maintenance, including insurance, on 1991 Porsche 928 would be higher. At 4,663 cc (8 cylinders), 1991 Porsche 928 is equipped with a bigger engine. In terms of performance, 1991 Porsche 928 (306 HP @ 5900 RPM) has 51 more horse power than 2008 BMW 630. (255 HP @ 6600 RPM). In normal driving conditions, 1991 Porsche 928 should accelerate faster than 2008 BMW 630. With that said, vehicle weight also plays an important factor in acceleration. 2008 BMW 630 weights approximately 230 kg more than 1991 Porsche 928.
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, 1991 Porsche 928 (408 Nm @ 4100 RPM) has 108 more torque (in Nm) than 2008 BMW 630. (300 Nm @ 2500 RPM). This means 1991 Porsche 928 will have an easier job in driving up hills or pulling heavy equipment than 2008 BMW 630. 2008 BMW 630 has automatic transmission and 1991 Porsche 928 has manual transmission. 1991 Porsche 928 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2008 BMW 630 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1991 Porsche 928 | 2008 BMW 630 | |
| Make | Porsche | BMW |
| Model | 928 | 630 |
| Year Released | 1991 | 2008 |
| Body Type | Coupe | Convertible |
| Engine Position | Front | Front |
| Engine Size | 4663 cc | 2996 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 306 HP | 255 HP |
| Engine RPM | 5900 RPM | 6600 RPM |
| Torque | 408 Nm | 300 Nm |
| Torque RPM | 4100 RPM | 2500 RPM |
| Engine Bore Size | 97 mm | 85 mm |
| Engine Stroke Size | 78.9 mm | 88 mm |
| Engine Compression Ratio | 10.0:1 | 10.7:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Top Speed | 319 km/hour | 250 km/hour |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 4 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1530 kg | 1760 kg |
| Vehicle Length | 4530 mm | 4830 mm |
| Vehicle Width | 2060 mm | 1860 mm |
| Vehicle Height | 1290 mm | 1380 mm |
| Wheelbase Size | 2510 mm | 2790 mm |
| Fuel Tank Capacity | 76 L | 70 L |
