Alpina had a very nice display of their cars at the Geneva Auto Show. The B5 and B6 (LCI models) celebrating the 50th Anniversary of Alpina automobiles.

BIMMERPOST moderator brings you a mega gallery from the show floor of the 2015 Geneva Auto Show.

BMW X6 (F16) by AC Schnitzer at the 2015 Geneva motor show.

BMW X6 (F16) by Hamann at the 2015 Geneva motor show, featuring a widebody style.

Now we turn to the tuner part of the Geneva auto show. First up is the AC Schnitzer “ACS4 Sport” M4 featuring a massive front spoiler lip and tail wing, bumper canards, and rear diffuser. Catalog inside.

The 2015 season marks the 17th season of BMW M as “Official Car of MotoGP” and the BMW M4 [see Official Thread] will be serving as the safety car. This year’s safety car is fitted with a full array of M Performance Parts, and also features some new technology under the hood — a water injection system.

The water injection system helps to lower temperatures in the combustion chamber, which helps prevent uncontrolled combustion (knock) and a loss in performance. In BMW’s words: cooler supercharged air reduces the engine’s tendency to knock, making it possible to bring the point of ignition forward and thus closer to the optimum value. This makes the combustion process more effective, whilst at the same time reducing the combustion temperature. On the other hand, cool air has a higher density which increases the oxygen content in the combustion chamber. This results in a higher mean pressure during the combustion process and in turn optimises performance and torque. Finally, the effective internal cooling of the combustion chamber reduces the thermal strain on numerous performance-related components. This not only prevents damage to pistons, exhaust valves and catalytic converters, but also reduces the strain on the turbocharger, which is subjected to lower exhaust temperatures.

The lower process temperatures also reduce the formation of hazardous substances, in particular nitrogen oxide (NOX). Water injection consequently dramatically improves the effectiveness of the engine.

BMW M has said that it will begin production of a model featuring water injection in the near future.

Also making its world public debut at the 2015 Geneva auto show is the F20/F21 1 Series LCI. Here are the highlights of the LCI update and our photos from the show.

One of the headlining BMW models at the 2015 Geneva auto show which just kicked off is the BMW 2 Series Gran Tourer, making its public debut.

The 2-series Gran Tourer [Official Thread] is a derivative of the Active Tourer and features both a taller and longer body. It also comes with third-row seating.

On display are the 220i M Sport and 220d xDrive models. Have a look from the show!