1976 BMW 630 vs. 1999 Opel Signum
To start off, 1999 Opel Signum is newer by 23 year(s). Which means there will be less support and parts availability for 1976 BMW 630. In addition, the cost of maintenance, including insurance, on 1976 BMW 630 would be higher. At 3,175 cc (6 cylinders), 1999 Opel Signum is equipped with a bigger engine. In terms of performance, 1999 Opel Signum (208 HP @ 6200 RPM) has 35 more horse power than 1976 BMW 630. (173 HP @ 5500 RPM) In normal driving conditions, 1999 Opel Signum should accelerate faster than 1976 BMW 630. With that said, vehicle weight also plays an important factor in acceleration. 1999 Opel Signum weights approximately 152 kg more than 1976 BMW 630. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 1976 BMW 630 is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 1976 BMW 630. However, in wet, icy, snow, or gravel driving conditions, 1999 Opel Signum, being front wheel drive (FWD), will offer much better control with better grip. 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, 1999 Opel Signum (300 Nm @ 4000 RPM) has 49 more torque (in Nm) than 1976 BMW 630. (251 Nm @ 4500 RPM). This means 1999 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 1976 BMW 630.
Compare all specifications:
| 1976 BMW 630 | 1999 Opel Signum | |
| Make | BMW | Opel |
| Model | 630 | Signum |
| Year Released | 1976 | 1999 |
| Body Type | Coupe | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 2986 cc | 3175 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 173 HP | 208 HP |
| Engine RPM | 5500 RPM | 6200 RPM |
| Torque | 251 Nm | 300 Nm |
| Torque RPM | 4500 RPM | 4000 RPM |
| Engine Bore Size | 89 mm | 87.5 mm |
| Engine Stroke Size | 80 mm | 88 mm |
| Engine Compression Ratio | 8.0:1 | 10.0:1 |
| Drive Type | Rear | Front |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1458 kg | 1610 kg |
| Vehicle Length | 4760 mm | 4640 mm |
| Vehicle Width | 1760 mm | 1800 mm |
| Vehicle Height | 1390 mm | 1470 mm |
| Wheelbase Size | 2630 mm | 2840 mm |
