AQA Large Data Set Practice Test 2026 – Complete Exam Prep

Think about how the average engine size for a brand depends on the kind of cars it sells. BMW tends to offer more models with larger engines (2.0–3.0 liters and up, plus higher-performance variants), which pulls its average up. The other brands in the list—Toyota, Ford, and Vauxhall—have many smaller, efficiency-focused engines in their lineup, which lowers their averages. So, BMW ends up with the largest average engine size across these five makes.