1951 Alvis TB 21 vs. 1986 Porsche 928
To start off, 1986 Porsche 928 is newer by 35 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 4,957 cc (8 cylinders), 1986 Porsche 928 is equipped with a bigger engine. In terms of performance, 1986 Porsche 928 (317 HP @ 6000 RPM) has 226 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM) In normal driving conditions, 1986 Porsche 928 should accelerate faster than 1951 Alvis TB 21.
Let's talk about torque, 1986 Porsche 928 (439 Nm) has 235 more torque (in Nm) than 1951 Alvis TB 21. (204 Nm). This means 1986 Porsche 928 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 | 1986 Porsche 928 | |
| Make | Alvis | Porsche |
| Model | TB 21 | 928 |
| Year Released | 1951 | 1986 |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 4957 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 91 HP | 317 HP |
| Engine RPM | 4000 RPM | 6000 RPM |
| Torque | 204 Nm | 439 Nm |
| Engine Bore Size | 84 mm | 100 mm |
| Engine Stroke Size | 90 mm | 78.9 mm |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 5 seats | 4 seats |
| Vehicle Length | 4430 mm | 4450 mm |
| Vehicle Width | 1680 mm | 1840 mm |
| Wheelbase Size | 2750 mm | 2510 mm |
