[MOC] 1:8 Koenigsegg Agera RS

[mihao]

I’m excited to share my latest project: a 1:8 scale LEGO Technic Koenigsegg Agera RS MOC.

 

Functions include:

1. Independent suspension on all wheels for authentic movement
2. Fully functional dihedral synchro-helix doors, trunk, and hood
3. Removable convertible roof
4. Adjustable body height
5. 8-speed gearbox with Drive / Idle / Reverse stick
6. Paddle shifters and working steering wheel (HOG control)

Here is the full demo video on Youtube:

 

Power Functions compatibility:
PF motors can be added to achieve driving, steering, lights, and body height adjustment. In theory, the components can be installed directly; in practice, it’s easier to remove a few pieces first to save your fingers.

Gearbox development:
The gearbox was by far the most challenging component. I wanted it to withstand high torque — tested with two L-motors. Early designs failed due to axle locking during part shifting. After multiple iterations, I refined the mechanism and reinforced the gearstick so it no longer pops back to idle under load. The final result is solid, and you can see it in action in the video.

Dihedral synchro-helix doors:
The doors are a signature feature of the real car, moving outward, forward, and upward at the same time. I achieved this by combining a Technic 28-tooth turntable with a hanging arm — a lifesaver solution that enabled smooth motion across all three directions.

Bodywork:
Designing the large-radius curves of the hood and roof was another headache. After much trial, I turned to Znap elements, which LEGO no longer produces. Despite being unconventional, they achieved a far better curvature than standard Technic or System parts.

Height adjustment:
The adjustable suspension relies on a complex gear train, including mechanisms to prevent over-rotation. Clutch gears are included in both the front and rear systems, so when torque is too high the clutch will slip, protecting the fragile bevel gears (especially the 8-tooth ones).

Instructions:
If you have an iPhone or iPad, the full instructions are available for free via the app: https://apps.apple.com/us/app/agera-rs/id6751605748 (or search “Agera RS” in the App Store).

For convenience, the app includes a missing parts tracker and can generate an XML file for BrickLink orders.
⚠️ Note: Two panels (4446 and 4443 – Technic Panel Curved #54 Left/Right) are not available in red from LEGO. Options include painting them or sourcing from third parties.

I’d love to hear your thoughts on both the design and the instruction app, so I know where improvements can be made. Thanks for checking it out!

[2GodBDGlory]

Looks nice! It's impressive to see a vehicle that can drive at reasonable speeds, while still having an 8-speed on board! Also, it's fun to see Znap usage like that!

[SNIPE]

I wish  I could build this on windows or android