{"id":2139953,"date":"2026-09-11T00:00:00","date_gmt":"2026-09-10T21:00:00","guid":{"rendered":"https:\/\/analyse.optim.biz\/?p=2139953"},"modified":"2026-09-11T00:00:00","modified_gmt":"2026-09-10T21:00:00","slug":"the-bovensiepen-spider-is-old-alpinas-430bhp-modified-bmw-z4","status":"publish","type":"post","link":"https:\/\/analyse.optim.biz\/?p=2139953","title":{"rendered":"The Bovensiepen Spider is Old Alpina\u2019s 430bhp modified BMW Z4"},"content":{"rendered":"
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Remember Alpina<\/a>? Not the new BMW iteration<\/a>, but the old one that did stuff like this. Old Alpina is now called Bovensiepen \u2013 after the man who started the original company<\/a> \u2013 and continues to knock out modified BMWs.<\/p>\n

Like this one. It\u2019s called the Bovensiepen Spider, and as thine eyes will attest, it is a modified BMW Z4<\/a>. Straight-six up front, two seats in the middle, much power exiting the rear.<\/p>\n<\/div>\n

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Indeed, Bovensiepen\u2019s upped the power from BMW\u2019s long-serving 3.0-litre inline turbo, here delivering a very healthy 430bhp and just under 430lb ft \u2013 more than the standard car\u2019s 355bhp and 369lb ft, you\u2019ll note \u2013 via an eight-speed auto to the rear wheels.<\/p>\n

Only a few tenths quicker to 62mph, mind, that time now 4.2s instead of 4.5s, but the top speed with the Performance Pack fitted rises to 183mph. And it\u2019s one of Old Alpina\u2019s strengths: engine mods.<\/p>\n<\/div>\n

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That \u2018B58\u2019 sixer gets an \u201cunrestricted\u201d air intake duct featuring an additional ram air channel, a larger intake silencer, and a new exhaust system that reduces back pressure (age comes for us all, Z4) and gives it a \u201csporty\u201d and \u201cbass heavy\u201d sound. There\u2019s better cooling, too.<\/p>\n

And tuned dampers (more compression at \u201clow damper speeds\u201d), longer aux springs at the back, and the option of bigger, more powerful brakes with four-pot calipers.<\/p>\n<\/div>\n

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Oh right, the Performance Pack. That adds a rear aluminium diff cover with larger cooling fins, that top speed increase, and an underbody V-brace to better stiffen up the Z4\u2019s chassis.<\/p>\n

McLaren P1 designer Frank Stephenson \u2013 who tells Top Gear which cars he thinks are hot or not<\/a> \u2013 has tweaked the Z4\u2019s exterior, just as he did with the Bovensiepen 05 GT<\/a>. Here he\u2019s added a new front splitter, side skirts, rear diffuser, a rear spoiler and 20in lightweight forged alloys. Ever so subtly different, just like you\u2019d expect from Old Alpina.<\/p>\n

Inside there\u2019s lots of leather, Alcantara, and the option to customise the life out of it. Not least because Bovensiepen is building just 99 of these Spiders, with prices starting from \u20ac115,500. Customers will get their cars from 2027 onwards.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Remember Alpina? Not the new BMW iteration, but the old one that did stuff like this. Old Alpina is now called Bovensiepen \u2013 after the man who started the original company \u2013 and continues to knock out modified BMWs. Like this one. It\u2019s called the Bovensiepen Spider, and as thine eyes will attest, it is […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[226,237],"class_list":["post-2139953","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-crawlmanager","tag-topgear-com"],"_links":{"self":[{"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=\/wp\/v2\/posts\/2139953","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2139953"}],"version-history":[{"count":0,"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=\/wp\/v2\/posts\/2139953\/revisions"}],"wp:attachment":[{"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2139953"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2139953"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2139953"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}