1999 Cadillac Catera vs. 1968 Opel Diplomat
To start off, 1999 Cadillac Catera is newer by 31 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, 1968 Opel Diplomat (227 HP @ 4700 RPM) has 27 more horse power than 1999 Cadillac Catera. (200 HP @ 6000 RPM) In normal driving conditions, 1968 Opel Diplomat should accelerate faster than 1999 Cadillac Catera. With that said, vehicle weight also plays an important factor in acceleration. 1999 Cadillac Catera weights approximately 15 kg more than 1968 Opel Diplomat.
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 167 more torque (in Nm) than 1999 Cadillac Catera. (260 Nm @ 3600 RPM). This means 1968 Opel Diplomat will have an easier job in driving up hills or pulling heavy equipment than 1999 Cadillac Catera.
Compare all specifications:
| 1999 Cadillac Catera | 1968 Opel Diplomat | |
| Make | Cadillac | Opel |
| Model | Catera | Diplomat |
| Year Released | 1999 | 1968 |
| Engine Position | Front | Front |
| Engine Size | 2962 cc | 5354 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 200 HP | 227 HP |
| Engine RPM | 6000 RPM | 4700 RPM |
| Torque | 260 Nm | 427 Nm |
| Torque RPM | 3600 RPM | 3000 RPM |
| Engine Compression Ratio | 10.0:1 | 10.5:1 |
| Top Speed | 199 km/hour | 202 km/hour |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1705 kg | 1690 kg |
| Vehicle Length | 4890 mm | 4960 mm |
| Vehicle Width | 1790 mm | 1910 mm |
| Vehicle Height | 1440 mm | 1450 mm |
| Wheelbase Size | 2940 mm | 2850 mm |
| Fuel Tank Capacity | 68 L | 80 L |
