The Lotus Carlton, also known as the Lotus Omega outside the UK, is a high-performance version of the Opel Omega executive car produced by Lotus Cars for General Motors (GM).

The Lotus Carlton was introduced in 1990 and featured a 3.6-liter twin-turbocharged inline-six engine. This engine was based on the Opel Omega's unit but heavily modified by Lotus to produce significantly more power. The power output was rated at around 377 horsepower (281 kW) and 419 lb-ft (568 Nm) of torque.

The Lotus Carlton was famously quick for its time, with a top speed of 176 mph (283 km/h) & could accelerate from 0 to 60 mph (0 to 100 km/h) in just 5.1 seconds. The car was equipped with a 6-speed manual gearbox, which contributed to its sporty and engaging driving experience. Lotus made several enhancements to the suspension and chassis to handle the increased power and improve handling, it also featured uprated brakes, stiffer springs, and recalibrated dampers compared to the standard Omega.

Visually, the Lotus Carlton was discreet and understated, with subtle design cues hinting at its high-performance nature. It featured wider wheel arches to accommodate larger wheels and tires, but otherwise maintained a relatively low-key appearance.

Production of the Lotus Carlton was limited, with only 950 units built between 1990 and 1992 of which only around 182 are believed to remain in the UK today. Each car was hand-assembled by Lotus at its facility in Hethel, Norfolk, UK.

It is often regarded as one of the most iconic and influential performance sedans of its era. It demonstrated that a large executive car could offer supercar-rivalling performance without sacrificing practicality.

Due to its rarity and cult status, the Lotus Carlton has become a sought-after collector's car. Well-preserved examples such as this car command high prices in the classic car market and make a great investment opportunity.

The Lotus Carlton remains a standout model in automotive history, showcasing the capabilities of both Lotus Cars and the engineering prowess of GM's European divisions.