Mini is equipping all of its John Cooper Works models with a new turbocharged 1.6-litre engine. A new six-speed automatic gearbox is also now an option across the high-performance line-up.

The new turbocharged aluminium engine replaces an engine of the same capacity in existing JCW Minis. It produces the same power and torque figures – 208bhp at 6000rpm and 192lb ft at 1850-5600rpm (207lb ft at 2000-5200rpm on overboost) – but fuel economy and CO2 emissions, as well as responses, have been improved.

In the standard three-door hatch equipped with a six-speed manual gearbox, economy has been improved from 39.8mpg to a claimed 42.8mpg and CO2 emissions have been cut from 165g/km to 153g/km. Performance figures are unchanged, meaning the Mini JCW hatch can crack 0-62mph in 6.5sec and reach a top speed of 148mph.

In the three-door equipped with the automatic gearbox, 0-62mph takes an extra 0.2sec and top speed is cut by 1mph. Fuel economy also drops slightly over the manual, down to 39.8mpg, while CO2 emissions are 12g/km higher at 165g/km.

All Mini JCWs – hatchback, Clubman, convertible, Coupe, Roadster and Countryman – are equipped with Mini’s full range of fuel-saving ‘Minimalism’ tech as standard, including stop-start, a brake energy recuperation system, a revised electric steering set-up and a gearshift indicator.

The new all-wheel-drive Countryman JCW gets a slightly more powerful version of the same engine. The 1.6 produces 215bhp and 207lb ft, while 0-62mph takes 7.0sec and with either the manual or automatic gearbox fitted. Top speed is 140mph in the manual and 139mph in the auto.

Fuel economy in the Countryman JCW is 38.2mpg with the manual and 35.8mpg with the automatic; CO2 emissions are 172g/km and 184g/km with the respective transmission options.