E28 refers to a specific model of the BMW 5 Series, produced from 1981 to 1988. It is known for its blend of performance, luxury, and advanced technology for its time. The E28 was available in various engine options, including inline-four and inline-six configurations, and it introduced features like anti-lock brakes and improved aerodynamics. The E28 is often celebrated for its classic design and driving dynamics, making it a popular choice among car enthusiasts. It was also the first 5 Series to offer the M5 variant, which became iconic for its high performance and sporty characteristics.