2003 Opel Signum vs. 1978 Porsche 911
To start off, 2003 Opel Signum is newer by 25 year(s). Which means there will be less support and parts availability for 1978 Porsche 911. In addition, the cost of maintenance, including insurance, on 1978 Porsche 911 would be higher. At 2,994 cc (6 cylinders), 1978 Porsche 911 is equipped with a bigger engine. In terms of performance, 1978 Porsche 911 (185 HP @ 5500 RPM) has 11 more horse power than 2003 Opel Signum. (174 HP @ 4000 RPM) In normal driving conditions, 1978 Porsche 911 should accelerate faster than 2003 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2003 Opel Signum weights approximately 515 kg more than 1978 Porsche 911.
Because 1978 Porsche 911 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 1978 Porsche 911. However, in wet, icy, snow, or gravel driving conditions, 2003 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, 2003 Opel Signum (370 Nm @ 1900 RPM) has 105 more torque (in Nm) than 1978 Porsche 911. (265 Nm @ 4100 RPM). This means 2003 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 1978 Porsche 911. 2003 Opel Signum has automatic transmission and 1978 Porsche 911 has manual transmission. 1978 Porsche 911 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2003 Opel Signum will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2003 Opel Signum | 1978 Porsche 911 | |
| Make | Opel | Porsche |
| Model | Signum | 911 |
| Year Released | 2003 | 1978 |
| Body Type | Hatchback | Coupe |
| Engine Position | Front | Rear |
| Engine Size | 2958 cc | 2994 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | boxer |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 174 HP | 185 HP |
| Engine RPM | 4000 RPM | 5500 RPM |
| Torque | 370 Nm | 265 Nm |
| Torque RPM | 1900 RPM | 4100 RPM |
| Engine Compression Ratio | 18.5:1 | 8.5:1 |
| Drive Type | Front | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1695 kg | 1180 kg |
| Vehicle Length | 4640 mm | 4300 mm |
| Vehicle Width | 1800 mm | 1660 mm |
| Vehicle Height | 1470 mm | 1330 mm |
| Wheelbase Size | 2710 mm | 2280 mm |
| Fuel Tank Capacity | 60 L | 80 L |
