1958 AC Ace vs. 2003 Opel Signum
To start off, 2003 Opel Signum is newer by 45 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 2,958 cc (6 cylinders), 2003 Opel Signum is equipped with a bigger engine. In terms of performance, 2003 Opel Signum (174 HP @ 4000 RPM) has 49 more horse power than 1958 AC Ace. (125 HP @ 6000 RPM) In normal driving conditions, 2003 Opel Signum should accelerate faster than 1958 AC Ace. With that said, vehicle weight also plays an important factor in acceleration. 2003 Opel Signum weights approximately 801 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, 2003 Opel Signum (370 Nm @ 1900 RPM) has 203 more torque (in Nm) than 1958 AC Ace. (167 Nm @ 4500 RPM). This means 2003 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 1958 AC Ace.
Compare all specifications:
| 1958 AC Ace | 2003 Opel Signum | |
| Make | AC | Opel |
| Model | Ace | Signum |
| Year Released | 1958 | 2003 |
| Body Type | Roadster | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 1971 cc | 2958 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 125 HP | 174 HP |
| Engine RPM | 6000 RPM | 4000 RPM |
| Torque | 167 Nm | 370 Nm |
| Torque RPM | 4500 RPM | 1900 RPM |
| Engine Bore Size | 66 mm | 87.6 mm |
| Engine Stroke Size | 96 mm | 82 mm |
| Engine Compression Ratio | 9.0:1 | 18.5:1 |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 894 kg | 1695 kg |
| Vehicle Length | 4010 mm | 4640 mm |
| Vehicle Width | 1520 mm | 1800 mm |
| Vehicle Height | 1270 mm | 1470 mm |
| Wheelbase Size | 2290 mm | 2710 mm |
| Fuel Tank Capacity | 59 L | 60 L |
