1976: two-year-old season

On his racecourse debut Tachypous contested the Astley Maiden Stakes over five furlongs at Newmarket Racecourse in May. He drifted in the betting market from 3/1 out to 15/2 and finished eighth. In the Berkshire Stakes over the same distance at Newbury Racecourse three weeks later he faced four opponents, three of whom had already won a race. He recorded his first success he took the lead approaching the final furlong and accelerated away from his rivals to win by five lengths. Tachypous was then moved up in class and distance and started favourite for the Coventry Stakes over six furlongs at Royal Ascot in June but ran very poorly and finished unplaced behind Cawston's Clown. He was subsequently found to be suffering from a viral infection^[5] which affected many of the horses in the Hobbs stable. He had not fully recovered when he ran in the Richmond Stakes at Goodwood Racecourse at the end of July but produced a much better effort, finishing third to J O Tobin and Priors Walk.^[6]

After an absence of over two months, Tachypous returned for the Middle Park Stakes over six furlongs at Newmarket in October. Despite his lack of a recent run he had been performing impressively in training and was made the 5/1^[7] joint favourite alongside the Michael Stoute-trained Etienne Gerard. The other runners included Nebbiolo, Mandrake Major (winner of the Flying Childers Stakes) Adviser (Sirenia Stakes) and Water Boy (runner-up in the Prix Morny) as well as the Hobbs-trained Anax who had won the Mill Reef Stakes but was reported to be significantly inferior to his stablemate. Tachypous appeared to be struggling in the early stages but began to make rapid progress in the last quarter mile. He took the lead 100 yards from the finish and won by a length from Nebbiolo with Mandrake Major third ahead of Adviser and Anax.^[6]

1977: three-year-old season

On his three-year-old debut Tachypous contested the Greenham Stakes (a trial race for the 2000 Guineas) over seven furlongs at Newbury Racecourse in April. He raced lazily^[5] in the early stages and was beaten a length and a half by He Loves Me, to whom he was conceding five pounds. He was equipped with blinkers in training and wore them when he started 12/1 second favourite in an eighteen-runner field for the 2000 Guineas at Newmarket. He took the lead two furlongs from the finish but was overtaken in the closing stages and beaten a length by Nebbiolo with The Minstrel a length back in third. On his next appearance he ran in the St James's Palace Stakes at Royal Ascot and finished third behind Don and Maryinsky. The blinkers were left off when Tachypous was stepped up in distance and matched against older horses in the Eclipse Stakes over ten furlongs at Sandown Park Racecourse in July. He reportedly took little interest in the race and finished unplaced behind Artaius. On his final appearance the colt was sent to Scotland for the Land of Burns Stakes over ten furlongs at Ayr Racecourse. He finished second, beaten three quarters of a length by the improving three-year-old North Stoke with the four-year-old Gunner B in third place.^[2]