Engineering and validation

Proven on every kind of road

Every Surja vehicle goes through in-house R&D, full-parameter testing on real Indian roads and independent certification before it reaches a customer.

Our process

Five stages from drawing board to road

  1. Concept and design

    Starting from the job: who drives, what they carry, and where.

  2. Prototype build

    Working prototypes of Vira, Dheera and Dheera+ built and refined.

  3. Validation testing

    Every key parameter tested across every road condition.

  4. ARAI certification

    Independent testing and type approval at ARAI, Pune. Completed Sep 2025.

  5. Production

    Production started, and vehicles are now on sale.

Test matrix

Tested where our customers drive

Choose a condition to see what we check.

Test condition

City traffic

Stop-start driving, tight turns and dense traffic, the daily reality for passenger and delivery routes.

What we check
  • Acceleration and stop-start behaviour
  • Braking performance in repeated stops
  • Manoeuvrability and turning
  • Thermal behaviour in slow traffic

Detailed test data: Tested over 70,000+ km across 10+ test sites, covering urban, rural, highway, and varied road conditions to validate performance, reliability, safety, and durability.

Engineering principles

How we design

Indian conditions first

Heat, dust, monsoon, rough roads and heavy use are the starting point of every design decision.

Easy to service

Parts and layouts chosen so local mechanics can maintain the vehicle quickly.

Driver-centred

The driver spends the whole day in the vehicle. Comfort, visibility and control matter.

Built to earn

Every variant is designed around the earnings of the business that runs it.

Manufacturing

From certification to production

After certification in September 2025, Surja started production of all three variants, building vehicles in real numbers, delivering them to customers and refining our processes as we grow.

Facility: Sabbavaram
Current capacity: -
Planned capacity: -

See the engineering for yourself

Book a test ride, or visit us to see how Surja vehicles are built.