The Vauxhall Astra SRi 1.6 CDTi stands out in the competitive family hatchback segment with its innovative diesel engine that prioritizes both performance and environmental responsibility. This model combines a smooth, torque-laden powertrain with practical interior space, making it suitable for daily commutes, family outings, and longer journeys. Equipped with a 1.6-liter diesel unit available in various power outputs, it promises low running costs alongside engaging driving dynamics.
Engine Performance and Power Delivery
At the heart of the Astra SRi 1.6 CDTi is a sophisticated diesel engine designed for quiet operation and strong low-end torque. The 134bhp variant delivers 320Nm of torque, enabling brisk acceleration with a 0-60mph time of around 9.7 seconds. This power is accessible from low revs, typically below 2,500rpm, allowing drivers to short-shift through the six-speed manual gearbox for optimal efficiency without sacrificing responsiveness.
The engine’s common-rail fuel injection and Lean NOx Trap (LNT) catalytic converter contribute to its eco-friendly profile by reducing nitrogen oxides without additives like AdBlue. In real-world testing, the powertrain feels flexible, with in-gear acceleration that outpaces many rivals, though it prefers a relaxed driving style over high-revving enthusiasm. Wind the revs higher, and a noticeable engine note enters the cabin, reminding drivers to stay within its comfort zone.
- Key Engine Specs: 1.6-liter turbo diesel, 108-158bhp options, up to 300Nm torque from 1,750rpm.
- Top speed reaches 124mph in base models, with 0-62mph in 10.2 seconds for the 110PS ecoFLEX version.
- High-pressure injection ensures smooth delivery, ideal for motorway cruising.
Fuel Economy and Emissions Data
Official figures highlight the Astra’s efficiency credentials, with the 108bhp model claiming up to 91.1mpg combined and CO2 emissions as low as 88-94g/km. The more powerful 134bhp SRi version achieves 72.4mpg and 104g/km, still competitive for tax-conscious buyers. Real-world results vary: testers reported 66.6mpg in mixed driving and over 60mpg on longer runs, aided by aerodynamic efficiency that keeps the body clean even in wet conditions.
| Model Variant | Official MPG | CO2 (g/km) | Real-World MPG |
|---|---|---|---|
| 108bhp ecoFLEX | 91.1 | 88-94 | 66.6+ |
| 134bhp SRi | 72.4 | 104 | 54-60 |
| 136hp Elite Nav | 72.4 | 103 | 58.1 |
These numbers position the Astra favorably against rivals like the Volkswagen Golf BlueMotion, especially for fleet users where low emissions translate to reduced company car tax. The diesel particulate filter and LNT system ensure compliance with stringent Euro standards without compromising drivability.
Driving Dynamics and Handling
The Astra SRi benefits from lowered sports suspension and precise steering, offering a balance between sporty handling and family comfort. Even with optional 19-inch wheels, the ride absorbs road imperfections adequately, though it feels firmer than softer rivals. Turn-in is sharp with minimal body roll, making it enjoyable on twisty roads, while well-weighted controls enhance confidence on motorways.
Refinement is a highlight: at cruising speeds, wind and road noise are subdued, creating a serene cabin environment. The engine purrs quietly under 2,500rpm, only becoming vocal when pushed hard. This setup suits drivers who value composure over outright speed, with torque enabling effortless overtaking.
Interior Comfort and Practicality
Inside, the Astra offers a spacious cabin with ample room for five passengers. The SRi trim adds sporty touches like bolstered seats and a driver-focused layout. Materials feel solid, and tech includes intuitive sat-nav with a large screen. Boot space is generous, and the five-door hatch design enhances accessibility for families.
- Seating: Supportive front sports seats, rear bench accommodates three adults comfortably.
- Tech: Touchscreen infotainment, cruise control, and optional navigation system.
- Storage: Deep door pockets, large glovebox, and 370-liter boot expandable via folding seats.
For business users, who make up 70% of sales, the low NVH (noise, vibration, harshness) levels and ergonomic controls make long trips less fatiguing.
Safety and Reliability Insights
Vauxhall equips the Astra with standard safety features including multiple airbags, stability control, and emergency braking assistance. Euro NCAP ratings for the model generation awarded five stars, praising occupant protection and child safety. The diesel’s efficiency aids in reducing whole-life costs, with competitive servicing and residual values around 33.9% after three years.
Long-term tests confirm durability, with averages of 54.1mpg over thousands of miles and low maintenance needs. Fleet managers appreciate the tax-friendly emissions and agile handling in urban traffic.
Trim Levels and Pricing Considerations
The SRi sits mid-range, blending sporty aesthetics with value. Base models start around £15,000 (historical pricing), rising with options like larger alloys. Rivals offer similar efficiency but at a premium; the Astra undercuts on price while matching refinement. Running costs are low: forecast cost per mile at 46.5-48.6p, factoring fuel, depreciation, and tax.
| Cost Factor | Estimate |
|---|---|
| P11D Price | £22,145 |
| Residual Value | 33.9% |
| Depreciation | £14,645 (3yrs) |
| Fuel (over 46k miles) | £3,965 |
Pros and Cons at a Glance
- Pros: Exceptional diesel refinement, strong torque, impressive economy, spacious interior, fun handling.
- Cons: Engine noise at high revs, firmer ride with big wheels, some rivals feel more premium.
Who Should Buy the Vauxhall Astra SRi 1.6 CDTi?
This model excels for efficiency-focused families, commuters, and fleet operators seeking a reliable, low-cost diesel without gimmicks. It’s a step up from predecessors in driving pleasure and tech, competing well against Golf and Leon equivalents through value and versatility.
FAQs
What is the fuel economy of the 1.6 CDTi engine?
Official combined figures range from 72.4-91.1mpg depending on variant, with real-world averages of 54-66mpg.
Is the Astra SRi suitable for families?
Yes, it offers generous space for five, a practical boot, and high safety ratings.
How does it handle compared to rivals?
Sharp steering and low body roll make it agile, though the ride is firmer with sports suspension.
What are the CO2 emissions?
From 88g/km in eco models to 104g/km in higher-power versions.
Is the engine refined?
Exceptionally quiet at low revs, dubbed ‘whisper diesel’ for its smoothness.
References
- Vauxhall Astra SRi 1.6 CDTi review — Auto Express. 2014-03-28. https://www.autoexpress.co.uk/vauxhall/astra/86377/vauxhall-astra-sri-16-cdti-review
- Road test: Vauxhall Astra Tech Line 1.6 CDTi 110 S/S ecoFLEX — Green Fleet. 2016-08-20. https://greenfleet.net/road-tests/21082016/astra-economical
- First drive: the 197bhp Vauxhall Astra SRi — Top Gear. Accessed 2026. https://www.topgear.com/car-reviews/vauxhall/astra/16t-16v-200-sri-nav-5dr/first-drive
- Vauxhall Astra 1.6 CDTi Elite Nav long-term test — Business Car. Accessed 2026. https://www.businesscar.co.uk/test-drives/vauxhall-astra-16-cdti-elite-nav-long-term-test/

