2003 Alfa Romeo 166 vs. 1968 Opel Diplomat
To start off, 2003 Alfa Romeo 166 is newer by 35 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 79 more horse power than 2003 Alfa Romeo 166. (148 HP @ 4000 RPM) In normal driving conditions, 1968 Opel Diplomat should accelerate faster than 2003 Alfa Romeo 166. With that said, vehicle weight also plays an important factor in acceleration. 1968 Opel Diplomat weights approximately 148 kg more than 2003 Alfa Romeo 166. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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, 2003 Alfa Romeo 166, 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, 1968 Opel Diplomat (427 Nm @ 3000 RPM) has 127 more torque (in Nm) than 2003 Alfa Romeo 166. (300 Nm @ 1800 RPM). This means 1968 Opel Diplomat will have an easier job in driving up hills or pulling heavy equipment than 2003 Alfa Romeo 166. 1968 Opel Diplomat has automatic transmission and 2003 Alfa Romeo 166 has manual transmission. 2003 Alfa Romeo 166 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:
| 2003 Alfa Romeo 166 | 1968 Opel Diplomat | |
| Make | Alfa Romeo | Opel |
| Model | 166 | Diplomat |
| Year Released | 2003 | 1968 |
| Engine Position | Front | Front |
| Engine Size | 2387 cc | 5354 cc |
| Engine Cylinders | 5 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 148 HP | 227 HP |
| Engine RPM | 4000 RPM | 4700 RPM |
| Torque | 300 Nm | 427 Nm |
| Torque RPM | 1800 RPM | 3000 RPM |
| Engine Bore Size | 82 mm | 101.6 mm |
| Engine Stroke Size | 90.4 mm | 82.6 mm |
| Engine Compression Ratio | 18.5:1 | 10.5:1 |
| Top Speed | 210 km/hour | 202 km/hour |
| Acceleration 0-100mph | 9.9 seconds | 10.3 seconds |
| Drive Type | Front | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1542 kg | 1690 kg |
| Vehicle Length | 4730 mm | 4960 mm |
| Vehicle Width | 1810 mm | 1910 mm |
| Vehicle Height | 1420 mm | 1450 mm |
| Wheelbase Size | 2600 mm | 2850 mm |
| Fuel Tank Capacity | 69 L | 80 L |
