Technic

Lamborghini Sián FKP 37

A lime green Technic supercar that builds like a proper engineering marvel.

4.1/5

Set 42115 · 2020

Pieces3,696

Minifigsn/a

Year2020

Set number42115

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The verdict

If your mate loves a long, meaty Technic build and wants a real showpiece at the end, this is one of the best supercars LEGO has ever done.

It's pricey and the bodywork gets a bit repetitive, but the working 8-speed gearbox and V12 make it worth the ride. Tell them to grab it if they've got the budget and the shelf space, and to skip it if they want something quick or cheap.

Best for: experienced Technic builders who want a display-worthy supercar

The full review

What it is

Let me tell you about the Lamborghini Sián FKP 37, a LEGO® set that sits right at the top end of the Technic supercar lineup. This is the big one, 3,696 pieces of lime green and gold that ends up as a 23-inch, 1:8 scale replica of Lamborghini's first hybrid hypercar. If you've ever eyed one of these giant Technic cars on a shelf and wondered whether it lives up to the hype, the short answer is yes. The Brothers Brick called it one of the best Technic sets ever made, and the community rating sits around 4.1 out of 5, which is strong for a set this expensive. It's got a working V12 with moving pistons, an 8-speed sequential gearbox you shift with a paddle, all-wheel drive, real suspension, and a spoiler that lifts. It's a lot of car.

The catch

Now for the honest bits, because your mate should know what they're getting into. This is not a cheap set. At an RRP of around 380 to 450 dollars depending on where and when you bought it, you're paying roughly ten cents a piece, which is steep even by LEGO standards. The value story here is about the experience and the display piece, not bang for buck. The build is long and there are stretches that get repetitive, especially the bodywork panels where you're repeating similar moves. A fair few people also ran into quality control gremlins, most notably mismatched shades of green on the rear spoiler, which stings on a set that costs this much and is all about that color. And there's no handbrake-on-ground mechanism, so if you want to roll it across a table and steer at the same time, it fights you a bit. These are real gripes builders raised, not dealbreakers, but worth knowing.

Who it's for

So who should grab this one? If your mate is an experienced Technic builder who enjoys a proper multi-evening project and wants something genuinely impressive to display when it's done, this is an easy recommendation. It's also a great pick for Lambo fans and car people who'll appreciate the working gearbox and the scale of it. Who should skip it? Anyone after a quick weekend build, anyone on a tight budget, or a younger builder who might get lost in the gearbox and suspension work. It officially retired at the end of 2025, so it's now a hunt-it-down set rather than a shelf-stocker, which means prices will only get funnier over time. If they've been circling it, tell them not to wait too long.

The parts story

What the build is actually like, and the pieces worth knowing about.

The build breaks into stages and it front-loads the clever stuff. You start with the chassis and drivetrain, and that's where the good engineering lives: the V12 engine block, the differential, and the star of the show, a fully functional 8-speed sequential gearbox. What makes it special is that the gearbox is open on the underside, so once the car is done you can flip it over and actually watch the mechanism work, and shifting gears genuinely changes how quickly the pistons pump. The chassis alone runs over 500 steps and a good five hours. After that you move into the bodywork, which reviewers found astonishingly complex in how the curved panels lock together, though this is also where the pacing dips because a lot of the panel work repeats. Each numbered box is roughly a two-hour sitting, so pace yourself.

On the parts front, this is a lime green lover's dream. Something like 60 elements show up in lime here, many of them for the very first time, and five pieces were completely new molds for this set. The standout new parts are the curved wheel arches, similar to the ones from the Porsche 911 and Bugatti Chiron but reshaped with curved tops instead of a flat upper surface. Add the gold rims, the disc brakes, and a huge pile of gears, panels, and pins, and you've got a parts haul with real reuse value if you build custom Technic. The catch, again, is price. At around ten cents a part it's one of the pricier ways to stock your bin, so most people buy this for the model, not the parts, and that's the right way to think about it.

Fun facts

01The FKP 37 in the name honors late Volkswagen Group chairman Ferdinand Karl Piëch, using his initials and 37 for his birth year of 1937.
02The real Sián is Lamborghini's first hybrid, pairing the V12 with a supercapacitor rather than a normal battery, and only 63 coupes were ever built.
03The LEGO model is 1:8 scale and stretches to about 23 inches long, roughly 58 cm, making it one of the largest Technic supercars.
04Five pieces in this set were brand-new molds, including reshaped curved wheel arches, and around 60 elements appear in lime green for the first time.