Pikes Peak · Unlimited Class

Tahkuna

Bespoke prototype designed from the ground up for one objective: the overall record at 4,302 metres. Internal combustion against thin air.

Class Unlimited

Powertrain 5.0L twin-turbo V6

Target power 1,200 bhp at altitude

Target weight 900 kg

Status Design & engineering

Overview

What Tahkuna Is

A bespoke Pikes Peak Unlimited class prototype, designed from the ground up to challenge the overall record on a course that climbs to 4,302 metres over 19.99 kilometres and 156 turns.

The current record—7:57.148—was set by a factory-backed electric prototype. An internal combustion engine loses approximately 35% of its power at the summit. The twin turbochargers compensate. The car is being engineered to challenge it.

All parameters are informed directly by data acquired from Kalana, Oldbac’s operational development mule. Pre-sale reservations are open for a limited number of customer allocations.

Tahkuna Pikes Peak prototype, alternate angle render

Technical Data

Specifications

Vehicle type	Two-seat prototype — Unlimited class
Target event	Pikes Peak International Hill Climb
Engine	5.0L twin-turbo V6
Power Target	1,200 bhp at altitude
Weight Target	900 kg
Downforce Target	2,860 kg at 250 km/h at sea level
Chassis	Carbon fibre monocoque
Aerodynamic basis	Kalana wind tunnel data & CFD correlation
Record target	Overall — sub-7:57
Build location	Estonia
Programme status	Design & engineering phase
Availability	Pre-sale open — limited allocation

All target figures are engineering objectives. Final specifications will be confirmed following prototype testing.

Programme Status

Development Timeline

Kalana data acquisition Physical track testing and Pininfarina wind tunnel validation complete
Vehicle design & engineering Aerodynamic and mechanical package being defined using Kalana correlation data
Prototype manufacture Carbon monocoque and powertrain build
Testing & validation Track testing and altitude simulation
Pikes Peak 2028 Race week — Unlimited class entry

Engineering

Altitude-Compensated Power

1,200 bhp target at 4,302 metres. The 5.0L twin-turbo V6 is sized to recover the 35% power loss that altitude imposes on naturally aspirated engines. The turbos do not add power. They maintain it.

2,860 kg downforce target at 250 km/h at sea level. Aero surfaces are designed for the lower air density at the summit. Data from Pininfarina and Kalana track testing provides the correlation basis.

Tahkuna prototype render, alternate view

Downforce at altitude

Aero surfaces optimised for lower air density at the summit. Wing profiles, floor, and diffuser geometry derived from Pininfarina wind tunnel data.

Low mass, no excess

900 kg target. Carbon monocoque. The course rewards power-to-weight and mechanical grip through 156 low-to-medium-speed corners.

Data-driven development

Every parameter derived from Kalana testing and wind tunnel data. Correlation-first: nothing assumed that has not been measured.

Gallery

Tahkuna & Kalana

Tahkuna Pikes Peak prototype, alternate perspective render — Tahkuna — Pikes Peak Unlimited prototype render

Tahkuna side view showing packaging and aerodynamic bodywork

Kalana at Pininfarina, Torino — wind tunnel data directly informs Tahkuna parameters

Kalana on track at speed ? physical validation for Tahkuna development — Kalana on track — physical telemetry feeds Tahkuna design

Information

Frequently Asked

What is Tahkuna intended to be?

A bespoke Pikes Peak Unlimited class prototype, designed from scratch to challenge the overall hill climb record using an internal combustion powertrain.

Is it road legal?

No. Tahkuna is a competition prototype. It is not designed for road use.

Is pre-sale open?

Yes. A limited number of customer allocations are available. Use the enquiry form to register interest.

What stage is development in?

Tahkuna is in the design and engineering phase. Aerodynamic and mechanical parameters are being defined using data acquired from the Kalana development programme.

Will the specification change?

Current figures are engineering targets. Final specifications will be confirmed following prototype build and testing. All target values are clearly labelled.

How many will be built?

One competition car and a limited number of customer vehicles. Exact allocation has not been finalised.

Can I register interest?

Yes. Use the enquiry form or contact sales@oldbac.com directly.

Where will it be built?

In Estonia, by the same team behind the Kalana.

Next Step

What Register Interest Means

Registering interest is not a purchase commitment. It places you on a list of serious parties who will be contacted when the programme reaches its next milestone. There is no deposit, no obligation, and no automated follow-up.

Tahkuna is in its design and engineering phase. Target specifications are clearly labelled. Final figures will be confirmed after prototype build and testing. One competition car and a limited number of customer vehicles are planned. Exact allocation has not been finalised.

What happens after you enquire

Your message is reviewed directly by the team.
If appropriate, we follow up with programme details and current status.
Serious parties are kept informed of key milestones.
No automated emails. No sales pressure.

Allocation

Register Interest

Not a commitment. Places you on the list of serious parties who will be contacted as the programme reaches its next milestone. No deposit, no obligation, no automated follow-up.