Noble M12 GTO: which version to buy and why
The Noble M12 GTO was sold in one generation (2000–2007) as a Coupe, with 3 versions: 2.5 MT (310 hp), 3.0 MT (352 hp), and 3.0 MT (425 hp). There is no later generation to “wait for,” so the buying question is which of these three mid-engine, RWD, Manual, Turbo Gasoline cars matches the job.
The Noble M12 GTO was sold in one generation (2000–2007) as a Coupe, with 3 versions: 2.5 MT (310 hp), 3.0 MT (352 hp), and 3.0 MT (425 hp). There is no later generation to “wait for,” so the buying question is which of these three mid-engine, RWD, Manual, Turbo Gasoline cars matches the job. Fuel use, tank size, CO2, eco class, and gross weight are not measured on any version; the comparison below uses only the figures that exist.
Specs that actually differ
| Version | hp / kW @ rpm | Nm @ rpm | cc | Fuel | Cylinders / layout | Boost | Gearbox | Drive |
|---|---|---|---|---|---|---|---|---|
| 2.5 MT | 310 / 228 @ 6000 | 320 @ 3500 | 2522 | Gasoline (95) | 5 / Inline | Turbo | Manual 5 | RWD |
| 3.0 MT (352 hp) | 352 / 259 @ 6200 | 350 @ 3500 | 2968 | Gasoline (95) | 6 / V-shaped | Turbo | Manual 6 | RWD |
| 3.0 MT (425 hp) | 425 / 313 @ 6500 | 390 @ 3500 | 2968 | Gasoline (95) | 6 / V-shaped | Turbo | Manual 6 | RWD |
All three use Central engine placement, Distributed injection (multi-point), 4 valves per cylinder, Independent, spring suspension front and rear, Ventilated disc front brakes, Disc rear brakes, 120 mm ground clearance, and 225/40 R18 / 265/35 R18 wheels. Compression ratio is 9 on 2.5 MT and not measured on both 3.0 MT cars. Bore × stroke is 83 × 93.2 on 2.5 MT and 89 × 79.5 on both 3.0 MT versions.
Performance and economy: the numbers that move the choice
| Version | 0–100 | Top speed | City / highway / combined | Kerb weight |
|---|---|---|---|---|
| 2.5 MT | 4.1 s | 258 km/h | not measured / not measured / not measured | 980 kg |
| 3.0 MT (352 hp) | 3.9 s | 265 km/h | not measured / not measured / not measured | 1050 kg |
| 3.0 MT (425 hp) | 3.5 s | 298 km/h | not measured / not measured / not measured | 1060 kg |
You cannot pick a version on mpg: consumption is not measured three times over. The spread that is measured is speed and mass.
- 2.5 MT → 3.0 MT (352 hp): +42 hp (+31 kW), +30 Nm, +446 cc, −0.2 s to 100 km/h, +7 km/h top speed, +70 kg.
- 3.0 MT (352 hp) → 3.0 MT (425 hp): +73 hp (+54 kW), +40 Nm, same 2968 cc, −0.4 s to 100, +33 km/h top speed, +10 kg.
- 2.5 MT → 3.0 MT (425 hp): +115 hp (+85 kW), +70 Nm, −0.6 s to 100, +40 km/h top speed, +80 kg.
Power per litre (hp ÷ displacement in litres): 2.5 MT 122.9 hp/l; 3.0 MT (352 hp) 118.6 hp/l; 3.0 MT (425 hp) 143.2 hp/l. The middle car is the least specific-output of the three; the top 3.0 MT is 24.6 hp/l above that middle car on the same 2968 cc.
Kerb weight per horsepower: 2.5 MT 3.16 kg/hp; 3.0 MT (352 hp) 2.98 kg/hp; 3.0 MT (425 hp) 2.49 kg/hp. The 425 hp car is 0.67 kg/hp lighter per horse than 2.5 MT even though it weighs 80 kg more in absolute terms.
Peak power arrives 200 rpm later on 3.0 MT (352 hp) than on 2.5 MT (6200 vs 6000) and 500 rpm later still on 3.0 MT (425 hp) (6500). Peak torque sits at 3500 rpm on all three, so the extra torque of the V-shaped sixes is not a different rev band — it is more force at the same rpm: 320 vs 350 vs 390 Nm.
Dimensions and weight: what does not change the verdict
Ground clearance is 120 mm on every version. Wheels are the same two sizes. Fuel tank is not measured. Gross weight is not measured. The only mass figure you can use is kerb weight: 980 kg (2.5 MT), 1050 kg (3.0 MT 352 hp), 1060 kg (3.0 MT 425 hp).
That 70 kg step from five-cylinder to the first six-cylinder is the expensive kilogramme: you pay 70 kg for 42 hp. The next 73 hp costs only 10 kg. If the buying rule is “do not add mass unless the power more than pays for it,” the 352 hp 3.0 MT is the awkward middle: +7.1% power vs 2.5 MT (42 / 310) against +7.1% mass (70 / 980) — almost a wash — while 0–100 improves by only 0.2 s (4.9% of 4.1 s) and top speed by 7 km/h (2.7% of 258).
The 425 hp 3.0 MT vs 2.5 MT is the opposite arithmetic: +37.1% power (115 / 310) for +8.2% mass (80 / 980), 0.6 s quicker to 100, 40 km/h more top speed.
Generations: nothing later to wait for
There is 1 generation, 2000-01-01 to 2007-12-31, Coupe, 3 versions, no restyle listed as a separate generation. Chassis layout, clearance, tyres, suspension type, brake type, drive, fuel type, injection type, boost type, and engine position do not change between versions. What changes is engine family and gearbox count: 5-cylinder Inline 2522 cc with 5-speed Manual on 2.5 MT, versus 6-cylinder V-shaped 2968 cc with 6-speed Manual on both 3.0 MT cars.
So “which generation” is not the question. “Which engine and how many gears” is.
Which version to choose
Choose 2.5 MT if the point is the lowest mass and the highest specific output among the cheaper pair. At 980 kg it is 70 kg lighter than 3.0 MT (352 hp) and 80 kg lighter than 3.0 MT (425 hp). It still does 4.1 s to 100 km/h and 258 km/h. It is the only version with a published compression ratio (9) and the only 5-speed Manual. Power density 122.9 hp/l beats the 352 hp six (118.6 hp/l). What you give up is 42 hp and 30 Nm versus the first 3.0 MT, 115 hp and 70 Nm versus the 425 hp car, one gear, and 40 km/h of top speed versus the fastest version. Fuel use is not measured, so you cannot claim it is cheaper to run — only that it is lighter.
Skip 3.0 MT (352 hp) unless you specifically want the six-cylinder and the sixth gear without the 425 hp output. Versus 2.5 MT the extras are 42 hp, 30 Nm, 446 cc, V-shaped 6 instead of Inline 5, and 6 gears instead of 5. Versus 3.0 MT (425 hp) on the same 2968 cc, same 6-speed Manual, same RWD, same wheels and 120 mm clearance, you are 73 hp and 40 Nm down, 0.4 s slower to 100, and 33 km/h slower at the top, while weighing only 10 kg less (1050 vs 1060 kg). That 10 kg is 0.95% of 1050 kg; the power gap is 20.7% (73 / 352). Weight-to-power is 2.98 kg/hp — better than 2.5 MT (3.16) but clearly behind 425 hp (2.49). Specific output 118.6 hp/l is the lowest of the three. If the catalogue question is “what does the extra displacement buy,” the honest answer on this middle car is: a sixth gear, a V-shaped six, 7 km/h more than 2.5 MT, and not much else that the 425 hp twin does not also have.
Choose 3.0 MT (425 hp) if the numbers that matter are acceleration, top speed, and kg per horsepower. It is the only version at 3.5 s to 100 km/h and 298 km/h. Against the other 3.0 MT it adds 73 hp and 40 Nm for 10 kg. Against 2.5 MT it adds 115 hp for 80 kg. It is the densest power plant (143.2 hp/l) and the lightest per horse (2.49 kg/hp). Peak power is the highest rpm of the set (6500). Compression ratio is not measured; consumption, tank, CO2, eco class, and gross weight are not measured — same blanks as the other two, so they do not break the tie. The chassis items that are measured (clearance, wheels, suspension type, brake type) are identical, so you are not buying a different car around the engine; you are buying the same Coupe RWD package with the strongest of the three Turbo Gasoline units.
A short decision rule on the arithmetic
- Want minimum kerb weight: 2.5 MT (980 kg).
- Want minimum seconds to 100 km/h: 3.0 MT (425 hp) (3.5 s).
- Want maximum speed: 3.0 MT (425 hp) (298 km/h).
- Want best kg/hp: 3.0 MT (425 hp) (2.49).
- Want best hp/l: 3.0 MT (425 hp) (143.2); second is 2.5 MT (122.9), not the 352 hp six.
- Want a 6-speed Manual and a V-shaped 6 without 425 hp: only 3.0 MT (352 hp) sits there — and it is the weakest value step of the three on power versus mass.
There is no generation-to-generation upgrade path: all three versions share 2000–2007. The buy is engine and gearbox, not year. Fuel economy cannot decide anything because city, highway, and combined use are not measured on 2.5 MT, 3.0 MT (352 hp), and 3.0 MT (425 hp) alike.