1971 Cadillac Eldorado vs. 1968 Opel Diplomat
To start off, 1971 Cadillac Eldorado is newer by 3 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 8,190 cc (8 cylinders), 1971 Cadillac Eldorado is equipped with a bigger engine. In terms of performance, 1968 Opel Diplomat (227 HP @ 4700 RPM) has 4 more horse power than 1971 Cadillac Eldorado. (223 HP @ 4400 RPM) In normal driving conditions, 1968 Opel Diplomat should accelerate faster than 1971 Cadillac Eldorado. With that said, vehicle weight also plays an important factor in acceleration. 1971 Cadillac Eldorado weights approximately 420 kg more than 1968 Opel Diplomat.
Because 1968 Opel Diplomat 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 1968 Opel Diplomat. However, in wet, icy, snow, or gravel driving conditions, 1971 Cadillac Eldorado, 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, 1971 Cadillac Eldorado (744 Nm @ 3000 RPM) has 317 more torque (in Nm) than 1968 Opel Diplomat. (427 Nm @ 3000 RPM). This means 1971 Cadillac Eldorado will have an easier job in driving up hills or pulling heavy equipment than 1968 Opel Diplomat.
Compare all specifications:
| 1971 Cadillac Eldorado | 1968 Opel Diplomat | |
| Make | Cadillac | Opel |
| Model | Eldorado | Diplomat |
| Year Released | 1971 | 1968 |
| Engine Position | Front | Front |
| Engine Size | 8190 cc | 5354 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 223 HP | 227 HP |
| Engine RPM | 4400 RPM | 4700 RPM |
| Torque | 744 Nm | 427 Nm |
| Torque RPM | 3000 RPM | 3000 RPM |
| Engine Bore Size | 109.2 mm | 101.6 mm |
| Engine Stroke Size | 109.3 mm | 82.6 mm |
| Engine Compression Ratio | 8.5:1 | 10.5:1 |
| Top Speed | 193 km/hour | 202 km/hour |
| Drive Type | Front | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 2110 kg | 1690 kg |
| Vehicle Length | 5630 mm | 4960 mm |
| Vehicle Width | 2040 mm | 1910 mm |
| Vehicle Height | 1370 mm | 1450 mm |
| Wheelbase Size | 3210 mm | 2850 mm |
| Fuel Tank Capacity | 100 L | 80 L |
