1951 Alvis TB 21 vs. 2013 BMW 7 Series
To start off, 2013 BMW 7 Series 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 4,395 cc (8 cylinders), 2013 BMW 7 Series is equipped with a bigger engine. In terms of performance, 2013 BMW 7 Series (439 HP @ 5500 RPM) has 348 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM) In normal driving conditions, 2013 BMW 7 Series should accelerate faster than 1951 Alvis TB 21.
Let's talk about torque, 2013 BMW 7 Series (651 Nm) has 447 more torque (in Nm) than 1951 Alvis TB 21. (204 Nm). This means 2013 BMW 7 Series 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 BMW 7 Series | |
| Make | Alvis | BMW |
| Model | TB 21 | 7 Series |
| Year Released | 1951 | 2013 |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 4395 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 91 HP | 439 HP |
| Engine RPM | 4000 RPM | 5500 RPM |
| Torque | 204 Nm | 651 Nm |
| Engine Bore Size | 84 mm | 89 mm |
| Engine Stroke Size | 90 mm | 88 mm |
| Engine Compression Ratio | 7.1:1 | 10.0 :1 |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Length | 4430 mm | 5214 mm |
| Vehicle Width | 1680 mm | 2134 mm |
| Wheelbase Size | 2750 mm | 3210 mm |
