Trollé began competitive racing in 1984 in the Championnat de France Formule Renault Turbo, the national Formula Renault championship, and finished as runner-up in the standings. The following year he stepped up to the French Formula Three Championship, where he claimed two victories and ended the season third in points — a strong result in a category that has historically served as a gateway to higher formulae for French talent.
In 1986 Trollé broadened his experience by contesting several prestige Formula Three invitational events, including the Macau Grand Prix, one of the most competitive one-off Formula Three fixtures on the international calendar. He also made a foray into sports car racing that year, entering a single World Sports-Prototype Championship race aboard a Porsche 962C entered by John Fitzpatrick Racing.
Trollé made his International Formula 3000 debut in 1987, and the series — which served as the direct feeder series to Formula One throughout the late 1980s — suited him immediately. He finished second in his very first race and then won the third round of the season at Circuit de Spa-Francorchamps in Belgium, one of the most demanding tracks on the calendar. He ended the year sixth in the championship, a creditable outcome for a newcomer.
He returned to Formula 3000 in 1988 and showed consistent pace, collecting two podium finishes in the opening six races. His season came to an abrupt halt after a serious accident at Brands Hatch, but he still accumulated enough points to be classified eleventh in the final championship standings.
By the late 1980s Trollé was widely regarded as among the best of a talented generation of French drivers, and genuine Formula One opportunities were within reach. He held conversations with both Larrousse and Tyrrell about seats for the 1989 season. A provisional agreement with Tyrrell was reportedly on the verge of being signed at the Belgian Grand Prix — scheduled for the weekend immediately following the Brands Hatch Formula 3000 race in which he was injured. The accident, and its aftermath, ultimately removed him from contention for the drive he had been close to securing.
After his Formula 3000 years, Trollé transitioned to sports car racing. In 1990 he joined Courage Compétition for a partial World Sports-Prototype Championship programme and made his debut at the 24 Hours of Le Mans with the team, finishing seventh overall — a solid result in the premier endurance race at a time when the field included factory machinery from Porsche, Mercedes-Benz, and Jaguar. He returned to Courage for the renamed Sportscar World Championship in 1991, contesting three rounds before stepping back from professional competition. Those 1991 races proved to be his final starts at international level.
Trollé's career trajectory illustrates both the depth of French single-seater talent in the mid-1980s and the fine margins that separate a future Formula One driver from one who nearly gets there. His Formula 3000 win at Spa and his near-miss with Tyrrell place him among the more significant near-graduates of the feeder series era, and his later Le Mans result demonstrated that his abilities translated across categories. The Brands Hatch accident in 1988, arriving at the precise moment an F1 contract appeared attainable, defined the boundary of what might otherwise have been a different career.