New Bovensiepen Spider revealed as £99k BMW Z4 with 429bhp

Bovensiepen, the new marque set up by the founders of Alpina, has turned the BMW Z4 into a 431bhp collector special called the Spider. The brand's third car – after the £320k Zagato coupé and £144k 05 GT estate – is its first convertible, but can trace its roots back 20 years to the Z4-based Alpina Roadster S that its creators produced in their previous guise. Just 99 examples will be produced, with deliveries beginning in early 2027, but the Spider is priced well below its range-mates, at the equivalent of £99,000 in Germany - roughly the same as a new BMW M4 convertible. The firm says that cars are constantly becoming "bigger, heavier and increasingly influenced by SUV designs", and as a result "a vehicle class that for decades epitomised the most immediate formof driving is disappearing: the lightweight, two-seater roadster".