The definition of a classic car can vary depending on the organization or insurance company you are referring to. Generally, many consider a vehicle to be a classic if it is at least 20 to 25 years old. However, some may specify that a classic car should also possess certain features, such as historical significance, unique design, or the presence of vintage technology. In the case of Hagerty Classic Car Insurance, they often refer to vehicles that are 25 years or older as classic cars. This age requirement allows for a broader range of vehicles to be recognized as classics. It is always a good idea to check the specific criteria that an insurance provider uses, which can often be found on their website.