RS 2.1

Did you ever want to build a fast LEGO Car which is able to reach 45km/h? THIS is the place where the limits of LEGO are being pushed.

Insured worldwide tracked shipping.

Delivery on request - shipping time 3-10 days

Note that Alternative Engineering is not responsible for any imposed customs duties and fees in your home country.


  • Power: 120W
  • V-MAX: 45 Km/h
  • L/W: 34cm / 23cm
  • WEIGHT: 712g
  • 4WD


Our instructions and models are made with the LEGO digital designer (LDD). The Instructions are of high quality and easy to follow for everyone who already has built some LEGO technic models. We additionaly provide PDFs with maintenance and driving information.


  • LEGO Digital Designer 3D Model

Parts Set

Alternative Engineerings LEGO SET provides a building experience right out of the box like you are used from normal LEGO Sets. The Set containing out of 100% original LEGO parts is counted by hand to prevent any missing part. 


In the Plug & Race Motorization Set everything has already been done for you! The Set containing out of quality RC electronics is ready to be installed in any of the four RS models in less than 10 minutes.

Since I started challenging real RC cars 5 years ago I couldn’t find a Lego or plug and play RC motorization that fit my needs. So I started configuring my own. My plug and race Motorization set makes no compromises in terms of weight, power, reliability and range!

​3D printed adapters

​To ensure a seamless integration into LEGO Framework all Alternative Engineering sets come with custom 3D printed adapters. The high performing 3rd party electronics can be plugged in like you are used with the LEGO ​power function ​parts.

​One of the two integration parts of the servo motor which is responsible for steering the car.

​The motorization is already plugged together waiting to be installed in your car or MOC.

2,4 Ghz Radio Control with 500m Range

The Radio control plus receiver is provided from the German brand Absima. It stands for high quality and fits the needs of all Alternative Engineering RS models perfectly!

 Radio Specification:

  • A.F.H.D.S. 2.4Ghz system
  • 2-channel radio
  • Ergonomic grip
  • Steering wheel with rubber foam
  • Internal antenna
  • 3-channel receiver with “failsafe” function

High Performance Brushless Motor

The core element which makes my cars upstanding from normal LEGO cars is the high performing brushless motor. It has to be very light, powerful and small to make the often considered impossible possible.


  • Max.continuous current: 15A/30S
  • Max.continuous power: 120 W
  • Weight: 34g
  • Max.lipo cell: 2-3S

Lipo Battery + Charger

To provide the needed 30 Ampere for the brushless motor I am using a 7,4V drone battery with a leading power-weight ratio. To enhance the battery lifetime of around 500-1000 circles a balance-charger comes with the Set.

Electronic Speed Controller

With the 30A electronic speed controller it’s possbile to have a steppless throttle and drive backwards. Advanced drivers can also configurate a auto breaking function.

Steering Servo

After all, a powerful car has to be controllable. The 4,5kg strong metal Servo provides fast and precise Steering. All RS models are able to change the steering direction in 0.14 sec.


What's the difficulty of building a LEGO car using my instructions?

Which 3rd parts are used for the motorization?

How can you contact us in case of uncertainties?

How much is the shipping and to which countries it's possible to ship?

How long do I have to wait for my ordered set?