2017 BMW 5 Series: 7 Series Comfort, 3 Series Agility Published on December 7, 2016 in First Drives by Sylvain Raymond Photo: Sylvain Raymond Those who want a little more power can opt for the 540i and its 3.0-litre, six-cylinder engine. It produces 335 hp, 35 more than in the outgoing 535i.