Vauxhall is replacing the core of its petrol and diesel line-up in the next 12 months with three all-new engine families.

The new motors, Vauxhall claims, will lead the industry for CO2 emissions, economy, torque and refinement.

Leading the charge will be a new 1.6-litre turbo petrol engine with direct injection and Start/Stop technology that will cut CO2 emissions by 13% compared with its predecessor. The four-cylinder engine will be available in various outputs and across several car lines.

Engineers achieved maximum torque of 221lb-ft from 1,700rpm, resulting in a class-leading specific output of 138lb-ft per litre. Peak power also increased to 200bhp at 4,700rpm – up 20bhp versus the current 1.6T.

“The quality, reliability and driveability of our cars is improving at an unprecedented rate,” said Duncan Aldred, chairman and managing director of Vauxhall Motors. “Replacing core engine ranges with high-output, high efficiency units will enhance our cars’ appeal still further and reinforce our commitment to producing first-class products."