The Alpina B5 and D5 (F10), known as the B5/D5 Bi-Turbo, are high-performance executive cars produced by Alpina between 2011 and 2016. These vehicles represent the second generation of the B5 model and build upon the success of the previous B5 (E60). The cars are based on the BMW 5 Series platform and were offered in both saloon and wagon configurations.

Key Points:
1. Model Lineup: The Alpina B5 and D5 Bi-Turbo are part of the high-performance executive car lineup by Alpina, offering a blend of luxury and power.
2. Engine: The B5 variant is powered by a modified 4.4-litre twin-turbocharged N63 V8 engine derived from the 550i. The enhancements include larger turbochargers, reinforced cylinder heads, NGK spark plugs, stronger MAHLE pistons, and a custom Alpina ECU.
3. Performance: The modifications to the engine result in an increase in maximum boost pressure to 14.5 psi, delivering impressive performance figures.
4. Design: The Alpina B5 and D5 (F10) feature sleek styling elements, reflecting the executive nature of the vehicles. The choice of saloon and wagon body styles offers versatility to potential buyers.
5. Legacy: The B5 and D5 Bi-Turbo models debuted at the 2010 Good

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