The win sees BMW knock Ford off its throne after three years at the top for its 999cc three-cylinder turbo EcoBoost motor. In fact, BMW took a total of four awards at the event, which was held today (17 June) at Engine Expo 2015, with the i8 engine also being awarded the New Engine award designed to mark the most important engine development in the last 12 months, and the 1.4-litre to 1.8-litre category. BMW also took the honours in the 2.5-litre to 3.0-litre category for its 3.0-litre twin-turbo six cylinder found in the M3 and M4.

Other highlights saw Tesla’s Model S grab the Green Engine award for the second consecutive year, while Ford’s 1.0 EcoBoost engine again took the Sub 1.0-litre category.

Mercedes-AMG took the 1.8-litre to 2.0-litre award with the 2.0-litre turbo found in the A45, CLA45 and GLA45 models, in a repeat of last year’s results. PSA Peugeot Citroën won in the 1-litre to 1.4-litre category to win with its new 1.2-litre three-cylinder turbo, found in a variety of cars, including the Peugeot 208 and 308, and Citroën C3, DS3, C4 Cactus, C4 and DS4.

Audi’s 2.5-litre five-cylinder turbo, found in the new RS3 and RS Q3, took the 2.0-litre to 2.5-litre title for a sixth consecutive year.

And Ferrari took its fifth Performance Engine and Above 4-litre category awards win with its 4.5-litre V8 in the 458 Italia and 458 Speciale while McLaren retained the 3.0-litre to 4.0-litre award with its V8 turbo found in the 650S, 625C and 12C.

Full list of awards:

International Engine of the Year 2015 – BMW 1.5-litre three-cylinder electric-gasoline hybrid  

Sub 1.0-Litre – Ford 999cc three-cylinder turbo  

1.0-Litre to 1.4-Litre – PSA Peugeot Citroën

1.2-litre three-cylinder turbo  

1.4-Litre to 1.8-Litre – BMW 1.5-litre three-cylinder electric-gasoline hybrid  

1.8-Litre to 2.0-Litre – Mercedes-AMG 2.0-litre turbo  

2.0-Litre to 2.5-Litre – Audi 2.5-litre turbo  

2.5-Litre to 3.0-Litre – BMW M 3-litre twin-turbo six-cylinder  

3.0-Litre to 4.0-Litre – McLaren 3.8-litre twin-turbo V8  

Above 4.0-Litre – Ferrari 4.5-litre V8  

Green Engine – Tesla full-electric powertrain  

New Engine – BMW 1.5-litre three-cylinder electric-gasoline hybrid  

Performance Engine – Ferrari 4.5-litre V8