That’s two different rulebooks to which a manufacturer can build a car for the top category of the series. So on the 16-stong Hypercar entry for Le Mans this year there are nine LMHs and six LMDhs. What is LMH and LMDh? LMH stands for Le Mans Hypercar, a rulebook that has been in force in the WEC since 2021. LMDh is new for 2023, but you’ll never see the name written out, it’s not officially an acronym. But it is easy to guess what the letters mean given that the class was formulated by the Automobile Club de l’Ouest at Le Mans and IMSA based at Daytona in the USA. That little ‘h’ on the end refers to the fact that these cars, like their LMH rivals, incorporate hybrid technology. The two types of car are very different in some respects, but actually very similar in others. What’s the difference? LMH allows a manufacturer to design and develop its own car from top to tail - or rather from the nose to the tail. That includes all elements of the hybrid system, which, if … [Read more...] about What are LMH and LMDh? The top Le Mans 24 Hours series explained