It's type approval, however there are differences with the UK engine
US Plus Four: Uses the BMW B46 engine. This is the US-emissions-compliant variant of BMW's 2.0-liter TwinPower Turbo four-cylinder.
UK Plus Four: Uses the BMW B48 engine. This is the European equivalent, which delivers the exact same output: 255 bhp and up to 295 lb-ft of torque
Comparing the two bonded-aluminum structures:CX Platform weighs 97 kg (214 lbs).CXV Platform: weighs 102 kg. While this is technically 5 kg (11 lbs) heavier, .Regarding rigidity, the CXV offers a 10% increase in torsional rigidity and up to a 100% increase in stiffness at certain suspension mounting points, where it really matters, so the 5 kg weight penalty is a very small price to pay the added stiffness and resultant improvements in handling utilising the CXV chassis plus the benefit of a better door arrangement..
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