From 2007 to 2010, a factory in England produced the 1.4-liter Mini One N12B14A engine, which was mounted on the most basic versions of the Mini in the rear of the R56 and the Clubman station wagon in the rear of the R55. Certain Peugeot-Citroen models under the EP3 index had a comparable power unit installed.
N12B14A, N12B16A, N16B16A, N14B16A, N14B16C, N18B16A, and N18B16C are engines from the Prince series.
Specifications
| Production years | 2007-2010 |
| Displacement, cc | 1397 |
| Fuel system | distributed injection |
| Power output, hp | 75 (One 75) 95 (One 95) |
| Torque output, Nm | 120 (One 75) 140 (One 95) |
| Cylinder block | aluminum R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 77 |
| Piston stroke, mm | 75 |
| Compression ratio | 11.0 |
| Features | DOHC, Valvetronic |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | on both shafts |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 4.2 |
| Fuel type | petrol |
| Euro standards | EURO 4 |
| Fuel consumption, L/100 km (for Mini One 2009) — city — highway — combined |
7.2 4.4 5.4 |
| Engine lifespan, km | ~250 000 |
The engine was installed on:
- Mini Clubman R55 in 2009 – 2010;
- Mini Hatch R56 in 2007 – 2010.
Disadvantages of the Mini N12B14A engine
Oil burn and intake coking are these engines’ most well-known issues;
Low resources distinguish the timing chain’s components, particularly the tensioner; Vanos-type phase regulators and the Valvetronic system also have comparatively little use;
This family of engines is also well-known for their frequent lubricant and antifreeze leaks;
A thermostat, a second lambda probe, and a water pump are the unit’s weak points.