1988 BMW M6 vs. 1968 Opel Diplomat
To start off, 1988 BMW M6 is newer by 20 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, 1988 BMW M6 (282 HP @ 6500 RPM) has 55 more horse power than 1968 Opel Diplomat. (227 HP @ 4700 RPM). In normal driving conditions, 1988 BMW M6 should accelerate faster than 1968 Opel Diplomat. With that said, vehicle weight also plays an important factor in acceleration. 1968 Opel Diplomat weights approximately 185 kg more than 1988 BMW M6.
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, 1968 Opel Diplomat (427 Nm @ 3000 RPM) has 93 more torque (in Nm) than 1988 BMW M6. (334 Nm @ 4500 RPM). This means 1968 Opel Diplomat will have an easier job in driving up hills or pulling heavy equipment than 1988 BMW M6. 1968 Opel Diplomat has automatic transmission and 1988 BMW M6 has manual transmission. 1988 BMW M6 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:
| 1988 BMW M6 | 1968 Opel Diplomat | |
| Make | BMW | Opel |
| Model | M6 | Diplomat |
| Year Released | 1988 | 1968 |
| Engine Position | Front | Front |
| Engine Size | 3453 cc | 5354 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 282 HP | 227 HP |
| Engine RPM | 6500 RPM | 4700 RPM |
| Torque | 334 Nm | 427 Nm |
| Torque RPM | 4500 RPM | 3000 RPM |
| Engine Bore Size | 93.4 mm | 101.6 mm |
| Engine Stroke Size | 84 mm | 82.6 mm |
| Engine Compression Ratio | 10.5:1 | 10.5:1 |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1505 kg | 1690 kg |
| Vehicle Length | 4760 mm | 4960 mm |
| Vehicle Width | 1730 mm | 1910 mm |
| Vehicle Height | 1360 mm | 1450 mm |
| Wheelbase Size | 2630 mm | 2850 mm |
| Fuel Tank Capacity | 70 L | 80 L |
