The 1909 Renault Gray Model 5-D was the first Harley-Davidson motorcycle to feature a V-twin engine.

So, understandably, a list of the ten biggest V-twin motorcycle engines available in 2025 is full of cruisers and tourers, and here they are. To ensure accuracy, the information compiled in this ...

When GMC launched the Twin Six V12 in 1961, it wanted to prove that gas engines could stand up to diesel mills in the heavy-duty segment — and, in some ways, it did with its magnificent low-end ...