Thomas is an LB&SCR E2 class engine, although he has nothing to do with Cars whatsover.
He is a blue LB&SCR E2, with red stripes, and a 0-6-0T configuration. He was built by L.B. Billinton at Brighton Works in May 1915. He arrived on the fictional island of Sodor the same month and year. His top speed is 30-40 mph. He has the number 1 printed on his cab in gold.