Jay Leno's car collection is being discussed, with some outlets reporting on the size and value of his collection, while others focus on specific vehicles, such as a 1,000 hp Toronado and a Mustang GTD. The number of cars in his collection is not consistently reported, with one outlet suggesting he has 151 cars that cannot pass a smog test. The stories also touch on the topic of emissions testing for old cars and its relevance.