The Thoroughbred. The Thoroughbred, Being shaped somewhat like the Akhal-Teke, is bred mostly for speed. Though the Thoroughbred is slim, fast and muscular the horse lacks the endurance of the Akhal-Teke and the Kuhaylan Arabian. This horse is not often used for long distance racing like its latter ancestors.he Akhal-Teke has influenced the Thoroughbred, Trakehner, Russian Don, Budyonny, Karabair, and the Karabakh. Has the endurance of an Arabian and is built thin and muscled. The Arabian. The Arabian horse, arguably the most beautiful breed of horse was originally breed for speed and endurance.