1973 Alfa Romeo Junior vs. 1957 BMW 503
To start off, 1973 Alfa Romeo Junior is newer by 16 year(s). Which means there will be less support and parts availability for 1957 BMW 503. In addition, the cost of maintenance, including insurance, on 1957 BMW 503 would be higher. At 3,168 cc (8 cylinders), 1957 BMW 503 is equipped with a bigger engine. In terms of performance, 1957 BMW 503 (138 HP @ 4800 RPM) has 52 more horse power than 1973 Alfa Romeo Junior. (86 HP @ 6000 RPM) In normal driving conditions, 1957 BMW 503 should accelerate faster than 1973 Alfa Romeo Junior. With that said, vehicle weight also plays an important factor in acceleration. 1957 BMW 503 weights approximately 530 kg more than 1973 Alfa Romeo Junior. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 1957 BMW 503 (222 Nm @ 2500 RPM) has 107 more torque (in Nm) than 1973 Alfa Romeo Junior. (115 Nm @ 3200 RPM). This means 1957 BMW 503 will have an easier job in driving up hills or pulling heavy equipment than 1973 Alfa Romeo Junior.
Compare all specifications:
| 1973 Alfa Romeo Junior | 1957 BMW 503 | |
| Make | Alfa Romeo | BMW |
| Model | Junior | 503 |
| Year Released | 1973 | 1957 |
| Engine Position | Front | Front |
| Engine Size | 1290 cc | 3168 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 86 HP | 138 HP |
| Engine RPM | 6000 RPM | 4800 RPM |
| Torque | 115 Nm | 222 Nm |
| Torque RPM | 3200 RPM | 2500 RPM |
| Engine Bore Size | 74 mm | 82 mm |
| Engine Stroke Size | 75 mm | 75 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Number of Seats | 2 seats | 4 seats |
| Vehicle Weight | 970 kg | 1500 kg |
| Vehicle Length | 3910 mm | 4760 mm |
| Vehicle Width | 1560 mm | 1710 mm |
| Vehicle Height | 1290 mm | 1400 mm |
| Wheelbase Size | 2260 mm | 2840 mm |
