1973 BMW 1502 vs. 2003 Opel Signum
To start off, 2003 Opel Signum is newer by 30 year(s). Which means there will be less support and parts availability for 1973 BMW 1502. In addition, the cost of maintenance, including insurance, on 1973 BMW 1502 would be higher. At 2,958 cc (6 cylinders), 2003 Opel Signum is equipped with a bigger engine. In terms of performance, 2003 Opel Signum (174 HP @ 4000 RPM) has 89 more horse power than 1973 BMW 1502. (85 HP @ 5800 RPM) In normal driving conditions, 2003 Opel Signum should accelerate faster than 1973 BMW 1502. With that said, vehicle weight also plays an important factor in acceleration. 2003 Opel Signum weights approximately 765 kg more than 1973 BMW 1502. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2003 Opel Signum (370 Nm @ 1900 RPM) has 240 more torque (in Nm) than 1973 BMW 1502. (130 Nm @ 3500 RPM). This means 2003 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 1973 BMW 1502.
Compare all specifications:
| 1973 BMW 1502 | 2003 Opel Signum | |
| Make | BMW | Opel |
| Model | 1502 | Signum |
| Year Released | 1973 | 2003 |
| Engine Position | Front | Front |
| Engine Size | 1573 cc | 2958 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 85 HP | 174 HP |
| Engine RPM | 5800 RPM | 4000 RPM |
| Torque | 130 Nm | 370 Nm |
| Torque RPM | 3500 RPM | 1900 RPM |
| Engine Bore Size | 84 mm | 87.6 mm |
| Engine Stroke Size | 71 mm | 82 mm |
| Engine Compression Ratio | 8.6:1 | 18.5:1 |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 930 kg | 1695 kg |
| Vehicle Length | 4240 mm | 4640 mm |
| Vehicle Width | 1600 mm | 1800 mm |
| Vehicle Height | 1420 mm | 1470 mm |
| Wheelbase Size | 2510 mm | 2710 mm |
| Fuel Tank Capacity | 50 L | 60 L |
