A smaller engine always uses less fuel, since its capacity is smaller - while that seems to make perfect sense, it really might not be the case these days.
Lamborghini has introduced a list of minor updates to the Huracan LP 610-4 for the 2016 model year, including a retuned AWD system and cylinder deactivation.
Audi is preparing to redesign the current A4 and launch the new model in mid 2014. The model will also receive cylinder deactivation technology.