The lime green flagship that rewards careful building
The Lamborghini Sián FKP 37 is not subtle. It is 60 cm long, finished in lime green with gold wheels, and built from 3,696 pieces. The colour makes it immediately recognisable, but the reason to spend time with it is the mechanical package under those panels.
The centre of the model is an eight-speed sequential gearbox linked to a V12 engine with moving pistons. Add working steering, front and rear suspension, scissor doors and an adjustable rear spoiler, and there is plenty to test before the body is complete.
The gearbox sets the tone
Like the other large Technic supercars, the Sián begins with the parts you will later struggle to see. The gearbox uses driving rings, selectors and a dense run of axles through the centre of the chassis. It is satisfying when it works, but it deserves slow, deliberate building.
Check every gear against the instruction angle and make sure the selectors move before enclosing them. The hand-of-god controls and paddles only feel right if those early parts are timed correctly. A gearbox problem is far easier to solve when the chassis is open.
From mechanism to Lamborghini shape
The later bodywork is a different sort of challenge. Long panels and angled connectors create the low nose, deep side intakes and sharp rear. The lime green elements do a good job of hiding the black frame, while the gold wheels finish the car properly.
The scissor doors are the showpiece. Their mechanism is integrated into the body rather than hung on afterwards, and opening both gives the finished model the stance people expect from a Lamborghini. The rear spoiler can also be adjusted, but the model remains a manual display build rather than a motorised one.
Cycle the gearbox and press both sides of the suspension before fitting the large lime panels. If anything catches, fix it while the mechanism is visible.
42115 kit details
Take on the Lamborghini Sián
It is one of the longer car builds in the Brick Club library and a very good choice if the gearbox matters as much to you as the finished shape.
Browse the libraryCompare subscriptionsWhere I would slow the build down
The Sián rewards a deliberate middle section. I would rotate the drivetrain after every gearbox connection, move the selector through its positions and compare the suspension left to right while the chassis is still bare. Once the lime panels and scissor-door structure are fitted, the same checks become awkward.
The second practical job is panel alignment. The body uses long runs of lime pieces, so a pin one hole out can make a gap look like a colour or moulding problem. I fit one side, check it from above, then use it as the reference for the other. LEGO’s official 42115 page records the set as retired, which is another reason I treat complete instructions and careful repacking as part of the library value rather than an afterthought.