1958 AC Ace vs. 2004 BMW 645
To start off, 2004 BMW 645 is newer by 46 year(s). Which means there will be less support and parts availability for 1958 AC Ace. In addition, the cost of maintenance, including insurance, on 1958 AC Ace would be higher. At 4,398 cc (8 cylinders), 2004 BMW 645 is equipped with a bigger engine. In terms of performance, 2004 BMW 645 (328 HP @ 6100 RPM) has 203 more horse power than 1958 AC Ace. (125 HP @ 6000 RPM) In normal driving conditions, 2004 BMW 645 should accelerate faster than 1958 AC Ace. With that said, vehicle weight also plays an important factor in acceleration. 2004 BMW 645 weights approximately 921 kg more than 1958 AC Ace. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2004 BMW 645 (451 Nm @ 3600 RPM) has 284 more torque (in Nm) than 1958 AC Ace. (167 Nm @ 4500 RPM). This means 2004 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 1958 AC Ace.
Compare all specifications:
| 1958 AC Ace | 2004 BMW 645 | |
| Make | AC | BMW |
| Model | Ace | 645 |
| Year Released | 1958 | 2004 |
| Body Type | Roadster | Convertible |
| Engine Position | Front | Front |
| Engine Size | 1971 cc | 4398 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 125 HP | 328 HP |
| Engine RPM | 6000 RPM | 6100 RPM |
| Torque | 167 Nm | 451 Nm |
| Torque RPM | 4500 RPM | 3600 RPM |
| Engine Bore Size | 66 mm | 92 mm |
| Engine Stroke Size | 96 mm | 82.7 mm |
| Fuel Type | Gasoline | Gasoline - Premium |
| Number of Seats | 2 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 894 kg | 1815 kg |
| Vehicle Length | 4010 mm | 4830 mm |
| Vehicle Width | 1520 mm | 1860 mm |
| Vehicle Height | 1270 mm | 1380 mm |
| Wheelbase Size | 2290 mm | 2790 mm |
| Fuel Tank Capacity | 59 L | 70 L |
