Class_A
int      id
int      price
string   definition

Class_A car = new Class_A()
{
    id = 1,
    price = 100000,
    definition = "Chevrolet 100 has 3000cc, using 250Cv. The 55/95 tires are
    included in the price. Just for 2 PAX... etc ..."
}

List<string> checkingList = new List<string>();
checkingList.Add("3000cc");
checkingList.Add("250Cv");
checkingList.Add("55/95 tires");

bool sucess;
sucess = car.Select(p => p.definition.Contains(checkingList)).FirstorDefault();
sucess = car.Select(p => p.Where(o => o.definition.Contains(checkingList)).FirstorDefault();
sucess = car.Select(p => p.Where(o => o.definition.ForEach.Contains(checkingList)).FirstorDefault();