Chamberlain went on to develop sports cars for Jaguar and Lotus in the 1990s before becoming a customer of the Chrysler Viper GTS-R program in the FIA GT Championship; the team later led MG's return to Le Mans in 2001.

Chamberlain later merged with Gareth Evans to form Chamberlain-Synergy Motorsport to campaign TVRs in 2004 before moving to the European Le Mans Series where they won another championship in 2005.

Chamberlain-Synergy left active motorsports in 2008, although Hugh Chamberlain continues to work as a manager and consultant with other teams in sports car racing.

Once sorting the Hart's issues for 1986 Chamberlain gathered the funding to move to an international series, entering the C2 category of the World Sports-Prototype Championship with the best result of seventh in class at Spa.

[1] In 1989, Spice moved to the upper class of the championship and Chamberlain switched from their turbocharged Hart motor to the more dominant Ford Cosworth V8.

New regulations coming into effect for the series left Chamberlain to enter only select races in 1991 before a return to a full-season effort in 1992, once more in the newly established FIA Cup category.

Chamberlain Engineering returned to prototype racing in 2001 at the behest of MG for a two-year campaign of their new cars at the 24 Hours of Le Mans.