1973 BMW Touring 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 Touring. In addition, the cost of maintenance, including insurance, on 1973 BMW Touring would be higher. At 3,173 cc (6 cylinders), 2003 Opel Signum is equipped with a bigger engine. In terms of performance, 2003 Opel Signum (207 HP @ 6200 RPM) has 122 more horse power than 1973 BMW Touring. (85 HP @ 5700 RPM) In normal driving conditions, 2003 Opel Signum should accelerate faster than 1973 BMW Touring. With that said, vehicle weight also plays an important factor in acceleration. 2003 Opel Signum weights approximately 583 kg more than 1973 BMW Touring. 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 (300 Nm @ 4000 RPM) has 170 more torque (in Nm) than 1973 BMW Touring. (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 Touring.
Compare all specifications:
| 1973 BMW Touring | 2003 Opel Signum | |
| Make | BMW | Opel |
| Model | Touring | Signum |
| Year Released | 1973 | 2003 |
| Engine Position | Front | Front |
| Engine Size | 1573 cc | 3173 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 85 HP | 207 HP |
| Engine RPM | 5700 RPM | 6200 RPM |
| Torque | 130 Nm | 300 Nm |
| Torque RPM | 3500 RPM | 4000 RPM |
| Engine Bore Size | 84 mm | 87.5 mm |
| Engine Stroke Size | 71 mm | 88 mm |
| Engine Compression Ratio | 8.6:1 | 10.0:1 |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Weight | 1030 kg | 1613 kg |
| Vehicle Length | 4120 mm | 4640 mm |
| Vehicle Width | 1600 mm | 1800 mm |
| Vehicle Height | 1390 mm | 1470 mm |
| Wheelbase Size | 2510 mm | 2840 mm |
