What is the fine-grained topic of the following text: Prepared to contest in an event with 140 world’s most impressive cars and bikes performing in front of over 60,000 people, the Caterham Seven 620 R 2014 will battle against Ariel, Aston Martin, Maserati and Lamborghini. Only return the topic.
Caterham Seven 620 R 2014 competing in a car and bike event