1951 Alvis TB 21 vs. 2013 Jaguar XJ
To start off, 2013 Jaguar XJ is newer by 62 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 5,000 cc (4 cylinders), 2013 Jaguar XJ is equipped with a bigger engine. In terms of performance, 2013 Jaguar XJ (503 HP @ 6500 RPM) has 412 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM) In normal driving conditions, 2013 Jaguar XJ should accelerate faster than 1951 Alvis TB 21.
Let's talk about torque, 2013 Jaguar XJ (625 Nm) has 421 more torque (in Nm) than 1951 Alvis TB 21. (204 Nm). This means 2013 Jaguar XJ will have an easier job in driving up hills or pulling heavy equipment than 1951 Alvis TB 21.
Compare all specifications:
| 1951 Alvis TB 21 | 2013 Jaguar XJ | |
| Make | Alvis | Jaguar |
| Model | TB 21 | XJ |
| Year Released | 1951 | 2013 |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 5000 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | W |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 91 HP | 503 HP |
| Engine RPM | 4000 RPM | 6500 RPM |
| Torque | 204 Nm | 625 Nm |
| Engine Bore Size | 84 mm | 92 mm |
| Engine Stroke Size | 90 mm | 93 mm |
| Engine Compression Ratio | 7.1:1 | 9.5:1 |
| Fuel Type | Gasoline | Gasoline / Electric Hybrid |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Length | 4430 mm | 5252 mm |
| Vehicle Width | 1680 mm | 2105 mm |
| Wheelbase Size | 2750 mm | 3157 mm |
