1968 Opel Diplomat vs. 1990 Porsche 911
To start off, 1990 Porsche 911 is newer by 22 year(s). Which means there will be less support and parts availability for 1968 Opel Diplomat. In addition, the cost of maintenance, including insurance, on 1968 Opel Diplomat would be higher. At 5,354 cc (8 cylinders), 1968 Opel Diplomat is equipped with a bigger engine. In terms of performance, 1990 Porsche 911 (316 HP @ 5750 RPM) has 89 more horse power than 1968 Opel Diplomat. (227 HP @ 4700 RPM) In normal driving conditions, 1990 Porsche 911 should accelerate faster than 1968 Opel Diplomat. With that said, vehicle weight also plays an important factor in acceleration. 1968 Opel Diplomat weights approximately 223 kg more than 1990 Porsche 911.
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, 1990 Porsche 911 (450 Nm @ 4500 RPM) has 23 more torque (in Nm) than 1968 Opel Diplomat. (427 Nm @ 3000 RPM). This means 1990 Porsche 911 will have an easier job in driving up hills or pulling heavy equipment than 1968 Opel Diplomat. 1968 Opel Diplomat has automatic transmission and 1990 Porsche 911 has manual transmission. 1990 Porsche 911 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 1968 Opel Diplomat will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1968 Opel Diplomat | 1990 Porsche 911 | |
| Make | Opel | Porsche |
| Model | Diplomat | 911 |
| Year Released | 1968 | 1990 |
| Engine Position | Front | Rear |
| Engine Size | 5354 cc | 3299 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | boxer |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 227 HP | 316 HP |
| Engine RPM | 4700 RPM | 5750 RPM |
| Torque | 427 Nm | 450 Nm |
| Torque RPM | 3000 RPM | 4500 RPM |
| Engine Bore Size | 101.6 mm | 97 mm |
| Engine Stroke Size | 82.6 mm | 74.4 mm |
| Engine Compression Ratio | 10.5:1 | 7.0:1 |
| Top Speed | 202 km/hour | 270 km/hour |
| Acceleration 0-100mph | 10.3 seconds | 5.4 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1690 kg | 1467 kg |
| Vehicle Length | 4960 mm | 4260 mm |
| Vehicle Width | 1910 mm | 1760 mm |
| Vehicle Height | 1450 mm | 1310 mm |
| Wheelbase Size | 2850 mm | 2270 mm |
| Fuel Tank Capacity | 80 L | 76 L |
