|Cutaway of the 875cc TwinAir. Click to enlarge.|
Fiat’s 875cc TwinAir engine (earlier post) was named the International Engine of the Year 2011. Judged by a panel of 76 motoring journalists from 36 countries as disparate as the USA, Japan, China, Russia, New Zealand, India, Korea, Germany, France, Romania, South Africa, Mexico and the UK, the Awards highlight and acknowledge engine engineering excellence.
The top award for the two-cylinder turbo was Fiat’s first, and only the second time a sub-1-liter engine took the top prize (the first being Toyota’s 1-liter Yaris VVT-i engine in 1999. The TwinAir was also named Best New Engine of the Year, Green Engine of the Year, and Sub 1-Liter engine.
Applied in the Fiat 500, the gasoline-fueled, 85 hp (63 kW), turbo two-cylinder features a small-sized turbine which, combined with dedicated valve management strategies, minimizes transient response times and keeps maximum power levels high. Compared with a 1.2-liter 8v engine, the new 85 HP turbo has 23% more power and a 30% better performance index. The performance of the two-cylinder is not only equivalent to a 1.4-liter 16v engine, but fuel consumption is 30% lower.
The TwinAir is equipped a number of features usually found in higher engine classes, such as the electrohydraulic control of the Multiair inlet valves and an innovative timing chain that cuts engine running costs because it does not need any maintenance. A counterrotating balancer shaft also guarantees that vibrational comfort is maintained in all operating conditions.
TwinAir weighs 85kg; emits 95g/km of CO2 and delivers fuel consumption of around 4.34 litres/100km (54 mpg US) in the Fiat 500.
Soon to be available in the new Lancia Ypsilon, the TwinAir will shortly also be launched on the market in the 65 HP aspirated version and in another high-performance 105 HP Turbo version, with a category-topping 120 hp/liter specific power, as well as in the ecological 80 HP Turbo bi-fuel version.
The other winners in this year’s International Engine of the Year awards were:
|Best Performance Engine||Ferrari 4.5-Liter V8|
|1-Liter to 1.4-Liter||Volkswagen 1.4-Liter TSI Twincharger|
|1.4-Liter to 1.8-Liter||BMW 1.6-Liter Turbo|
|1.8-Liter to 2-Liter||BMW 2-Liter Twin-Turbo Diesel|
|2-Liter to 2.5-Liter||Audi 2.5-Liter Turbo|
|2.5-Liter to 3-Liter||BMW 3-Liter DI Twin-Turbo|
|3-Liter to 4-Liter||BMW 4-Liter V8|
|Above 4-Liter||Ferrari 4.5-Liter V8|
In 2010, Fiat’s 1.4 MultiAir Turbo engine was awarded the Best New Engine 2010 award.
The Awards are organized by Engine Technology International, published by UKIP Media & Events, which also publishes a number of other automotive titles.