Buick Regal Cielo Concept, 2000. A version of the the regular production Regal GS that used the folding hardtop idea from the earlier Cielo Concept and suggested it might become a special edition model though it never did
What a difference 50 years makes juxtaposition of Buick Century Regal Colonnade Hardtop Sedan, 1974 & Buick Regal, 2024. The original Regal was introduced as a flagship version of the Century, becoming a stand alone model in 1976. It used the then new GM A-body platform and used GM's 350ci (5.7 litre) V8 with a 455ci (7.5 litre) V8 optional, both driving through a 3-speed automatic gearbox. The facelifted Regal for the Chinese market is based on the now discontinued 2nd generation Opel Insignia using GM's Epsilon II platform powered by a choice of turbocharged 1.5-litre or 2.0-litre 4 cylinder engines, both using a 9-speed automatic gearbox