1951 Alvis TB 21 vs. 2003 Opel Speedster
To start off, 2003 Opel Speedster is newer by 52 year(s). Which means there will be less support and parts availability for 1951 Alvis TB 21. In addition, the cost of maintenance, including insurance, on 1951 Alvis TB 21 would be higher. At 2,993 cc (6 cylinders), 1951 Alvis TB 21 is equipped with a bigger engine. In terms of performance, 2003 Opel Speedster (145 HP @ 6000 RPM) has 54 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM) In normal driving conditions, 2003 Opel Speedster should accelerate faster than 1951 Alvis TB 21.
Let's talk about torque, 1951 Alvis TB 21 (204 Nm) has 1 more torque (in Nm) than 2003 Opel Speedster. (203 Nm). This means 1951 Alvis TB 21 will have an easier job in driving up hills or pulling heavy equipment than 2003 Opel Speedster.
Compare all specifications:
| 1951 Alvis TB 21 | 2003 Opel Speedster | |
| Make | Alvis | Opel |
| Model | TB 21 | Speedster |
| Year Released | 1951 | 2003 |
| Engine Position | Front | Middle |
| Engine Size | 2993 cc | 2198 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 91 HP | 145 HP |
| Engine RPM | 4000 RPM | 6000 RPM |
| Torque | 204 Nm | 203 Nm |
| Engine Bore Size | 84 mm | 86 mm |
| Engine Stroke Size | 90 mm | 94.6 mm |
| Engine Compression Ratio | 7.1:1 | 10.0:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Number of Seats | 5 seats | 2 seats |
| Vehicle Length | 4430 mm | 3790 mm |
| Vehicle Width | 1680 mm | 1710 mm |
| Wheelbase Size | 2750 mm | 2710 mm |
