Market evolution: Diesel engines (CN 840890) — 2015–2025

Introduction

This report examines the evolution of EU trade in compression-ignition internal combustion piston engines classified under CN 840890, a residual heading that excludes marine propulsion engines and engines for road vehicles (Chapter 87). The products covered span a wide power range—from small engines of 15–30 kW used in agricultural and construction equipment to very large units exceeding 5,000 kW deployed in power generation and industrial applications. The analysis draws on Eurostat trade data covering the full 2015–2025 period and identifies three overarching dynamics: (i) the EU's strengthening position as a net exporter with rising unit values; (ii) a significant geographic reorientation of trade flows, notably the surge in exports to Türkiye and imports from China; and (iii) a structural shift toward fewer, higher-value engines in production and export, even as import volumes grow in the smaller power segments.

1. Rising export value and premium positioning despite flat volumes

EU exports grew in value much faster than in weight

Over the 2015–2025 period, EU exports of CN 840890 engines rose from €1.80 billion to €2.25 billion (+25.1%), while tonnage increased only 5.0% (from 136,783 t to 143,676 t). This divergence implies a significant increase in the average value per tonne, which climbed from €13,149/t to €15,657/t (+19.1%).

This pattern suggests that EU manufacturers have shifted their export mix toward higher-value, more technologically sophisticated engines—consistent with a competitive strategy of occupying the premium end of industrial diesel engine markets worldwide.

The unit count fell sharply, confirming a move to larger, costlier engines

The supplementary unit data (number of pieces exported) tells an even more striking story: the EU exported 431,230 engines in 2015 but only 360,974 in 2025, a decline of 16.3%. Yet total value rose 25%. The implied per-unit price surged from €4,171 to €6,232 (+49.4%), indicating a clear upmarket shift: the EU is exporting fewer engines, but each engine is, on average, substantially more expensive.

Sweden and France emerged as fast-growing exporters; Germany remained dominant

Among EU Member States, Germany remained the largest exporter, accounting for €852 million in 2025 (+18.3% vs. 2015). However, the most dynamic growth came from Sweden (€218M → €433M, nearly doubling) and France (€240M → €397M, +65.6%). Italy, the second-largest exporter in 2015 at €399M, saw its exports decline to €330M (−17.3%), losing ground to Sweden and France. The specialisation analysis confirms Finland, France, and Sweden as the most specialised exporters (RSCA > 0.58), while Germany shows moderate specialisation (RSCA = 0.21) and Italy is essentially balanced.

2. Geographic reorientation: Türkiye's explosive rise, China's dual role, and shifting import partners

Türkiye became the EU's fastest-growing export destination

The most dramatic geographic shift in EU exports was the surge in shipments to Türkiye, which grew from €39.8 million in 2015 to €204.0 million in 2025—an increase of 412.7%. Türkiye rose from a minor destination to the fifth-largest non-EU export market, surpassing established partners like Brazil and Japan. This growth likely reflects Türkiye's expanding industrial base, its role as a manufacturing hub, and possibly its position in regional supply chains. However, the volatility data shows that this relationship is also quite unstable: the coefficient of variation for exports to Türkiye was 0.57, and a price shock was detected in 2023 with a 30.9% price shift.

China's role evolved from marginal import supplier to major player

China's position in EU trade for this product changed dramatically over the decade. As an import source, China went from just €16.6 million in 2015 to €125.5 million in 2025—a 655% increase—making it the fourth-largest import partner by 2025. Simultaneously, the EU's exports to China also grew substantially, from €189M to €300M (+58.7%), making China the second-largest export destination after the United States. This bilateral growth is consistent with China's dual role as both a rapidly industrialising market and an emerging manufacturer of industrial diesel engines.

The US remained the EU's top export market, while Japan led on imports

The United States was consistently the EU's largest export destination, growing from €403M to €705M (+74.8%), and is notable for its low volatility (CV = 0.20), suggesting a stable, mature commercial relationship. On the import side, Japan was the leading source, with imports rising from €285M to €428M (+50.3%), followed by the United Kingdom (€331M → €396M, +19.8%)—the latter reflecting post-Brexit trade patterns where the UK, despite leaving the EU's customs union, remains deeply integrated in engine supply chains.

India emerged as an import source with very high volatility

The most volatile import relationship was with India: imports surged from €7.9 million to €75.9 million (+861%), but with a coefficient of variation of 0.68, indicating significant year-to-year swings. This likely reflects the growth of Indian manufacturing capacity in smaller industrial diesel engines and the EU's increasing reliance on cost-competitive Indian suppliers in certain power segments.

Import concentration decreased; export concentration increased

The Herfindahl-Hirschman Index (HHI) for imports declined from 2,495 to 1,960 (−21.4%), indicating that the EU diversified its sources of imported engines—away from heavy reliance on a few suppliers toward a broader base including China, South Korea, and India. Conversely, the export HHI rose from 837 to 1,373 (+64.0%), meaning EU exports became somewhat more concentrated among fewer destination markets, likely driven by the growing share of the United States and Türkiye.

3. Structural transformation: shifting power segments and a widening production-value gap

Production volumes collapsed while value edged up

EU domestic production of CN 840890 engines fell from 670,682 units to 352,022 units over the decade (−47.5%), yet production value rose from €3.03 billion to €3.57 billion (+17.6%). This implies the average production value per engine nearly doubled—from roughly €4,525 to €10,132—confirming that EU manufacturers are producing far fewer, but substantially more valuable, industrial diesel engines. This transformation likely reflects both the long-term structural decline in demand for smaller diesel engines (due to electrification and environmental regulations) and a strategic repositioning toward larger, more specialised power units.

Imports surged in volume while unit values compressed

While export unit values rose, import dynamics told a different story. Import tonnage grew from 76,498 t to 111,226 t (+45.4%), but the average price per tonne edged down slightly from €13,951 to €13,710 (−1.7%). More dramatically, the supplementary unit count of imported engines more than doubled—from 566,115 to 1,250,118 pieces (+120.8%)—while the per-unit price collapsed from €1,885 to €1,220 (−35.3%). This suggests a flood of lower-cost, smaller-power engines entering the EU market, primarily from Asian suppliers.

Smaller power segments dominate import growth

Looking at individual sub-segments, the import growth was concentrated in the smaller power classes. For the 15–30 kW segment (84089043), import volumes grew from 11,182 t to 17,169 t while supplementary unit counts rose from 91,680 to 139,151 pieces. For the 100–200 kW segment (84089061), supplementary units surged from 49,673 to 271,357 pieces—an extraordinary 446% increase—while the per-piece supplementary price fell from €3,232 to just €823. This pattern is consistent with manufacturers in China and India scaling up production of standardised, lower-cost diesel engines for the EU's agricultural, construction, and backup power markets.

The EU trade surplus persisted but imports grew faster than exports

The EU's trade balance in CN 840890 remained positive throughout the period—peaking at €731 million in 2015 and settling at €725 million in 2025, essentially flat (−0.9%). However, the balance dipped as low as €268 million in 2020 (during the COVID-19 shock) before recovering. Meanwhile, net import reliance was negative throughout (confirming net exporter status), but the EU's trade intensity nearly doubled from 35.7% to 68.4%, and export propensity surged from 23.1% to 55.5%. This means the EU diesel engine sector has become dramatically more export-oriented over the decade—a sign of both competitive strength and increased dependence on global demand.

Conclusion

The EU's trade in CN 840890 diesel engines over 2015–2025 reflects a sector in structural transformation. The EU has maintained—and arguably strengthened—its role as a net exporter, but the character of that trade has fundamentally changed. Exports have become more value-intensive, with fewer units commanding significantly higher prices, pointing to a competitive strategy anchored in larger, more specialised, and technologically advanced engines. Production data reinforces this narrative: EU manufacturers cut output volumes nearly in half while increasing total production value, a hallmark of moving upmarket.

At the same time, the import side reveals mounting competitive pressure in the smaller, lower-power segments. Asian suppliers—particularly from China, India, and South Korea—have dramatically expanded their presence in the EU market, with import volumes and piece counts surging while unit values decline. This suggests that the EU's competitive advantage is increasingly concentrated in the mid-to-high power range (roughly 100 kW and above), where European manufacturers like Volvo Penta, Deutz, and Perkins retain strong positions. Below that threshold, the market is increasingly contested.

Geographically, the most notable shifts have been the explosive growth of exports to Türkiye, the rapid emergence of China as both a major customer and competitor, and the continued dominance of the United States as the EU's premier export market. The declining concentration of imports suggests growing supply diversification—a positive signal for resilience—while the rising export concentration warrants monitoring, given the sector's increased dependence on a handful of destination markets. Overall, the EU diesel engine industry appears to be navigating the global energy transition by consolidating its strengths in higher-value segments, even as the broader market landscape evolves around it.