The differences between the 2021 and 2020 Buick Regal GS are as follows: 1. Exterior: The older model features third-generation ADB anti-glare technology in its headlights, with the entire light assembly consisting of 105 LED light sources. The internal lighting zones have been increased from 15 to 84, offering 10 different lighting modes. The new Regal GS has a redesigned headlight design, with standard LED headlights. The winged chrome grille accents, paired with the daytime running lights on both sides, create a sense of continuity, visually widening the front fascia. The side profile adopts a fastback design, complemented by a small ducktail spoiler at the rear. 2. Interior: The older Premium model's front seats come with electric adjustment, lumbar support adjustment, heating, ventilation, and massage functions, along with seat memory. The new model features overall soft-material wrapping and, compared to the current model, the new Regal GS comes standard with an ETRS electronic gear shifter. The multifunction steering wheel has been redesigned and includes standard paddle shifters, enhancing driving pleasure along with the wraparound cockpit. Additionally, the new Regal GS is equipped with an upgraded Buick eConnect intelligent connectivity system, improving the fluidity of human-machine interaction. 3. Powertrain: The older model is powered by the eighth-generation Ecotec 2.0T engine. Compared to the 2019 SIDI 2.0T engine, its maximum power is reduced by 24kW, but the peak torque remains at 350N·m. It is paired with a 9-speed HYDRA-MATIC transmission. The new Regal GS offers two engine options: a 1.5T engine with a maximum power of 124kW and peak torque of 250N·m (model designation "552T"), and a 2.0T engine with a maximum power of 174kW and peak torque of 350N·m, featuring cylinder deactivation technology (model designation "652T"). Both engines are matched with a 9-speed automatic transmission.
