Doug DeMuro gives the 1987 Ford Sierra RS500 Cosworth a strong 76/100 rating, praising it as an icon for enthusiasts and the ultimate version of the Ford Sierra that defined a generation's dreams. The car excels in design with its legendary double-decker rear wing and Gurney flap, driving dynamics with a tight shifter and linear clutch, and livability featuring heavily bolstered Recaro seats and surprisingly roomy rear seating. However, the interior suffers from typical mid-80s shortcomings with prominent panel gaps, squeaks, and rattles, while the cabin tech features quirky controls like the manually operated sunroof requiring specific pulling and twisting motions. This car is for serious collectors and enthusiasts who value raw performance and iconic styling over modern refinement and reliability.