An analysis shows that all-wheel drive is often unnecessary for motorhomes on European roads. The system costs between 8,000 and 20,000 euros extra and increases fuel consumption by 1 to 3 litres of diesel per 100 km, while reducing payload and interior height. For most travellers, front-wheel drive is the lightest, cheapest and most space-saving option; rear-wheel drive makes sense mainly for vehicles over 3.5 tonnes or when towing.