2021 McLouis Fusion 331. Bigger, Better & Back in the UK! Stylish Italian Range Now With Enhanced Specification & 160 BHP Automatic Gearbox. The Fusion Motorhome range returns with a bang for 2021, better than ever before. Starting at 6 metres long, Fusion models feature a variety of expertly designed practical layouts, including a plethora of high specification equipment, and are crafted with meticulous attention to detail. • 4 Berth.