1954 Alfa Romeo 6C vs. 1951 Alvis TB 21
To start off, 1954 Alfa Romeo 6C is newer by 3 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 3,494 cc (6 cylinders), 1954 Alfa Romeo 6C is equipped with a bigger engine. In terms of performance, 1954 Alfa Romeo 6C (271 HP @ 6500 RPM) has 180 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM). In normal driving conditions, 1954 Alfa Romeo 6C should accelerate faster than 1951 Alvis TB 21.
Compare all specifications:
| 1954 Alfa Romeo 6C | 1951 Alvis TB 21 | |
| Make | Alfa Romeo | Alvis |
| Model | 6C | TB 21 |
| Year Released | 1954 | 1951 |
| Engine Position | Front | Front |
| Engine Size | 3494 cc | 2993 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 271 HP | 91 HP |
| Engine RPM | 6500 RPM | 4000 RPM |
| Engine Bore Size | 87 mm | 84 mm |
| Engine Stroke Size | 98 mm | 90 mm |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 2 seats | 5 seats |
| Vehicle Length | 3530 mm | 4430 mm |
| Wheelbase Size | 2250 mm | 2750 mm |
