Complex sentence: Ironically, the planned use of the Lamborghini V12 was also the major reason why Nelson Piquet chose not to re-sign with the team after 1989 with the triple World Champion correctly predicting that the under-developed engine would hamper both his and the teams chances.
Split into simpler sentences: Ironically, the planned use of the Lamborghini V12 was also the major reason why Nelson Piquet chose not to re-sign with the team after 1989. The triple World Champion correctly predicted that the engine was under-developed and would hamper both his and the teams chances.