Arrma Vendetta 3S BLX vs HPI Racing RS4 Sport 3 FluxWhich Should You Buy?

Straight-line speed is the headline here. The Arrma Vendetta 3S BLX hits 70 mph on 3S power. The HPI Racing RS4 Sport 3 Flux manages 50 mph on 2S. That is a 40% speed gap at an identical a competitive price price point, which makes the Vendetta the obvious choice for anyone chasing top-end numbers. The Vendetta achieves this through a larger 1/8-scale platform at 22.72 inches long, a well-tuned brushless system, and an aerodynamic body that actually generates meaningful downforce at speed. The RS4 at 17.13 inches is more traditionally proportioned for 1/10 on-road and feels composed at its speeds, but it simply was not designed to compete in the same velocity bracket.

Handling characteristics differ because of the scale and design philosophy. The Vendetta's longer 14.57-inch wheelbase gives it excellent high-speed stability, and the car tracks straight at 70 mph without constant correction. But it is less nimble in tight spaces, and the larger footprint means you need more room to operate. At 5.51 lbs it is heavier than the RS4's 4.85 lbs, which you feel in transitions and direction changes. The RS4 Sport 3 Flux has a shorter 10.24-inch wheelbase that makes it more responsive at lower speeds and more fun on tighter parking lot circuits. Its lower ground clearance of 0.39 inches versus the Vendetta's 0.59 inches keeps the center of gravity low and cornering flat. For pure circuit driving at moderate speeds, the RS4 actually provides a more engaging experience because it rewards precision rather than just holding the throttle wide open.

Build quality reveals some trade-offs worth considering. The Vendetta is waterproof, which matters more than you might think for an on-road car since wet parking lots and unexpected rain are common realities. The RS4 Sport 3 Flux is not waterproof, so you need to avoid moisture or seal the electronics yourself. The Vendetta's chassis is designed around durability at extreme speeds, with protective skid plates and a solid composite tub that can survive the inevitable curb strike at 60 mph. The RS4 uses HPI's proven shaft-drive 4WD system, which is mechanically sound but does not have the same crash protection since HPI expects you to drive on smooth surfaces at more moderate speeds.

Runtime differs significantly by battery spec. The Vendetta runs a 3200mAh 3S setup, which at 70 mph runs down quickly, maybe 12-15 minutes of hard driving. The RS4 Sport 3 Flux uses a 5000mAh 2S pack, which provides better endurance at its lower speeds, stretching to 20-25 minutes comfortably. The RS4's lower voltage also means cheaper battery replacement costs over time. If you are doing speed runs, you will want multiple packs for the Vendetta to avoid short sessions.

For value, both sit at its price point and the Vendetta gives you more raw performance per dollar. You get a bigger car, faster speeds, waterproofing, and a platform that turns heads at the park. The RS4 Sport 3 Flux makes sense if you specifically want a scale-realistic 1/10 touring car for on-road fun at sensible speeds, and the HPI body options are really attractive. The RS4 has a heritage in the touring car world that enthusiasts appreciate. But dollar for dollar, the Vendetta is the stronger overall package for most buyers.