Stellantis has acquired the remaining stake in its Thiruvallur manufacturing joint venture in India, taking full ownership of a vehicle plant the group intends to expand from around 16,000 units this year to more than 43,000 annually by 2028.
The company bought the holding owned by Hindustan Motor Finance Corporation, part of the CK Birla Group, in Stellantis Automobiles India Private Limited. Financial terms have not been disclosed.
The transaction removes the joint-venture ownership structure that has governed the manufacturing business since the original partnership was established and gives Stellantis direct control of the Thiruvallur operation in Tamil Nadu.
Vehicle assembly at the site began in 2021. The plant currently produces Citroën models including the C3, ë-C3, C3 Aircross, and Basalt, with Stellantis reporting localisation above 95% across the operation.
The company is targeting an increase in annual output from approximately 16,000 vehicles in 2026 to more than 43,000 by 2028, a rise of more than 160%.
Direct employment is expected to more than double from the current workforce of around 610, while Stellantis also expects additional jobs to be created through the supplier and logistics ecosystem.
Those figures are targets rather than completed capacity. Achieving them will require the factory, workforce, component suppliers, and outbound logistics network to scale broadly in step with one another.
A vehicle assembly plant cannot increase output in isolation. Body panels, plastics, glass, seats, wiring, electronics, tyres, batteries, powertrain components, fasteners, and numerous other parts have to arrive in the correct sequence and at the same quality as line speed rises.
The reported localisation level means a significant portion of that growth would pass through the regional supplier base rather than being satisfied simply by importing complete assemblies.
Stellantis has not published its methodology for the 95% figure, so the number should be treated as the company’s stated localisation measure rather than as a separately audited assessment of every vehicle’s domestic content.
The plant also serves export markets. Stellantis says vehicles produced at Thiruvallur are supplied to eight markets across four continents, giving the facility an operating role beyond India’s domestic sales network.
Export production creates additional manufacturing complexity because different markets may require changes to vehicle specification, software, homologation, safety equipment, labelling, emissions systems, or customer features.
Managing those derivatives through the same plant becomes increasingly demanding as output grows. Material sequencing and build control have to ensure the correct combination of components reaches each vehicle without slowing the line or creating quality problems.
The site also assembles both combustion-engine vehicles and the battery-electric ë-C3. Mixed-powertrain production provides flexibility while demand between technologies remains uncertain, but it introduces additional requirements around battery handling, high-voltage safety, assembly processes, end-of-line testing, and workforce training.
Full ownership gives Stellantis more direct control over how those production decisions are made. Joint ventures can provide local expertise, capital sharing, and an established market route, but they also require major investment and product decisions to operate through a shared governance structure.
Taking complete ownership allows the group to align Thiruvallur more directly with its regional product, engineering, procurement, and export strategy.
Stellantis says it has invested close to INR 11,000 crore in India across manufacturing, engineering, and export infrastructure. The company has not disclosed the capital expenditure specifically required to lift Thiruvallur beyond 43,000 vehicles annually.
That leaves the machinery behind the capacity increase undefined. Higher production could require changes across body, paint, trim, final assembly, testing, logistics, automation, tooling, shifts, or supplier capacity depending on where the current plant’s constraints lie.
Increasing output by more than 160% can also expose bottlenecks outside the assembly hall. A stamping supplier or logistics provider running close to capacity can become as restrictive as the vehicle plant itself if its production system is not expanded at the same rate.
India’s automotive manufacturing base gives Stellantis access to a mature supplier network and a substantial pool of engineering and production skills. The country is increasingly being used by international groups both as a domestic market and as an export platform for vehicles and components.
Thiruvallur’s eight-market export footprint fits that model. Larger output can spread fixed manufacturing costs across more vehicles and improve asset utilisation, provided sufficient demand exists to keep the additional capacity occupied.
The transaction itself therefore completes only the ownership part of the programme. Full control is already in place; the industrial challenge now is to turn that simpler governance structure into higher throughput without diluting quality or localisation.
By 2028, the useful measure will not be the acquisition but whether the plant has reached the targeted production rate, doubled its direct workforce, maintained supply-chain performance, and continued serving multiple export markets while managing both electric and combustion-engine vehicle manufacture.
