1951 Alvis TB 21 vs. 1984 Ford Sierra
To start off, 1984 Ford Sierra is newer by 33 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, 1951 Alvis TB 21 (91 HP @ 4000 RPM) has 25 more horse power than 1984 Ford Sierra. (66 HP @ 4200 RPM). In normal driving conditions, 1951 Alvis TB 21 should accelerate faster than 1984 Ford Sierra.
Let's talk about torque, 1951 Alvis TB 21 (204 Nm) has 64 more torque (in Nm) than 1984 Ford Sierra. (140 Nm). This means 1951 Alvis TB 21 will have an easier job in driving up hills or pulling heavy equipment than 1984 Ford Sierra.
Compare all specifications:
| 1951 Alvis TB 21 | 1984 Ford Sierra | |
| Make | Alvis | Ford |
| Model | TB 21 | Sierra |
| Year Released | 1951 | 1984 |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 2304 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 91 HP | 66 HP |
| Engine RPM | 4000 RPM | 4200 RPM |
| Torque | 204 Nm | 140 Nm |
| Engine Bore Size | 84 mm | 94 mm |
| Engine Stroke Size | 90 mm | 83 mm |
| Fuel Type | Gasoline | Diesel |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Length | 4430 mm | 4510 mm |
| Vehicle Width | 1680 mm | 1740 mm |
| Wheelbase Size | 2750 mm | 2620 mm |
