Technic

McLaren Senna GTR

A sweet little supercar that finally gets the shaping right, if you can forgive the blue.

Brick Rated Score

3.9/5

Set 42123 · 2021

Pieces830

Minifigsn/a

Year2021

Set number42123

Check price on Amazon

Affiliate link. We may earn a commission at no extra cost to you.As an Amazon Associate we earn from qualifying purchases.

The verdict

This is the set that made me stop rolling my eyes at Technic's mid-size supercars.

At 1:15 it sits nicely on a shelf, the roofline is genuinely clever, and the build stays fun the whole way through. Just know going in that the play features are thin (engine, steering, doors, that is the lot) and the front end never quite lands the way the rear does. If you want a good looking model car and a relaxed evening or two of building, it delivers.

Best for: Display-first builders who want a good looking supercar without the Ultimate set price

The full review

What it is

I went into the McLaren Senna GTR expecting another forgettable mid-shelf Technic car and came out genuinely charmed. It is an 830-piece 1:15 model of one of the wildest track-only McLarens ever made, and what got me was the roof. To capture that sloped canopy the designers used angled lift arms with staggered joints, and it reads as accurate rather than approximated. From a plain framework, a real supercar silhouette grows piece by piece, and even after a lot of Technic sets I hit a few techniques I had not met before.

The catch

I will be straight with you about where it wobbles. This is a display model wearing a Technic badge. The functions come down to a fake V8 with moving pistons, opening dihedral doors, and working steering, and for some builders that is too little mechanical meat for the theme. The rear half is the star, but the mojo runs out toward the front, where the nose and the rear-view mirrors feel like the design ran short on time. Then there is the blue. Plenty of people, myself included on some days, wish the whole thing came in orange instead, partly for looks and partly to skip the stickers on the front mudguards. The car is also a touch narrow from certain angles, which McLaren purists will clock instantly.

Who it's for

So here is where I land. If you build to display, and you want a handsome supercar that will not crowd out the rest of your shelf or empty your wallet, this is an easy one to love, and it is a big step up from the old Corvette ZR1 in the same size class. If you build for mechanical complexity, gearboxes, and things that actually do something when you push them, you will find this one a little quiet and may want to look at one of the bigger flagship cars instead. Since it retired at the end of 2023 it has held its value well, hovering right around its original price, so there is no urgency-panic reason to grab it, just get it if the model speaks to you.

The parts story

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

Building it is a calm, satisfying couple of evenings rather than a marathon. The chassis comes together fast, then the panels and shaping start layering on and the car appears almost suddenly. It is not a difficult build and there is no gearbox to wrestle, so it suits a relaxed session where you actually get to enjoy the techniques instead of untangling them. The dihedral doors are the highlight moment, and the fake V8 pistons give you that little reward of pushing the car and watching them move.

The clever bit for parts fans is how ordinary elements get repurposed. The instantly recognisable rear lights are built from two red lightsaber blades pushed into Technic pins, which is exactly the kind of lateral thinking I love to find. Several beams and a two-axle module appeared in blue for the first time in this set, so it is a small treasure chest for anyone who hoards recolors. For 830 pieces at a fifty-dollar list price the part-count value is fair rather than generous, but the shaping work you get out of those parts punches above the number.

Fun facts

01The set retired at the end of 2023 after a roughly three-year run, and it has held close to its original 49.99 dollar price since.
02The distinctive rear lights are made from two red lightsaber blade elements inserted into Technic pins.
03Several beams and a module with two cross axles showed up in blue for the very first time in this set.
04At 1:15 scale it is smaller than the Ferrari 488 GTE, a deliberate choice to keep it display-friendly for collectors.