10. Audi Q7 V12 TDI (Worst)
The Audi Q7 V12 TDI, introduced in 2008, was a technical powerhouse with its massive diesel engine and jaw-dropping torque. However, its sheer weight, excessive fuel consumption, and astronomical running costs rendered it wildly impractical for most buyers. Despite its engineering bravado, the V12 TDI failed to connect with the market and was discontinued soon after launch. Today, it’s remembered more as an engineering oddity than a practical SUV choice. See review