These three mid-engined sports cars represent the pinnacle of driving excitement, blending raw power, agile chassis, and premium craftsmanship. The lightweight **Alpine A110**, brute-force **Audi TT RS**, and benchmark **Porsche 718 Cayman S** go head-to-head in acceleration sprints, track prowess, everyday refinement, and value. Drawing from rigorous test data, this comparison reveals their strengths and reveals the ideal choice for enthusiasts seeking pure driving joy.
Powertrain Breakdown: Engines That Define Character
Each car boasts a turbocharged four-cylinder heart, but their deliveries and sounds set them apart dramatically.
- Alpine A110 Premiere Edition: A 1.8-liter inline-four pumps out 249 bhp at 6,000 rpm and 320 Nm from 2,000 rpm. Paired with a slick seven-speed dual-clutch transmission (DCT) sending power rearward, it emphasizes agility over outright grunt.
- Audi TT RS: The standout 2.5-liter five-cylinder (yes, five pots in a compact package) unleashes 395 bhp at 5,850 rpm and a massive 480 Nm from 1,700 rpm. Quattro all-wheel drive (AWD) and a seven-speed DCT ensure explosive launches.
- Porsche 718 Cayman S PDK: 2.5-liter flat-four delivers 345 bhp at 6,500 rpm and 420 Nm from just 1,900 rpm. The PDK seven-speed auto and rear-wheel drive (RWD) combo prioritizes precision.
The Audi’s five-cylinder warble provides the most intoxicating soundtrack, evoking rally heritage, while the Porsche’s turbo-four offers broad torque for effortless overtakes. The Alpine’s unit is rev-happy but lacks the drama of its rivals.
Performance Metrics: Straight-Line Supremacy
Sprint times highlight the Audi’s AWD grip advantage, but in-gear pulls expose nuanced differences.
| Metric | Alpine A110 | Audi TT RS | Porsche 718 Cayman S |
|---|---|---|---|
| 0-60 mph | 4.6 sec | ~3.5 sec (est.) | 3.9 sec |
| 30-70 mph (gears) | 3.9 sec | 2.1 sec | 3.6 sec |
| 50-70 mph (5th/6th/7th) | 4.5/4.7/5.7 sec | 4.0/5.7/8.0 sec | 3.0/4.6/9.3 sec |
| Top Speed | 155 mph | 155 mph | 177 mph |
| 70-0 mph Braking | 44.0 m | 45.7 m | 44.0 m |
The TT RS dominates 0-60 with AWD traction, but the Cayman edges in-gear flexibility, especially 50-70 mph in fifth at 3.0 seconds—ideal for real-road surges. The A110 holds its own despite modest power, thanks to featherweight construction.
Braking is a tie between Alpine and Porsche at 44 meters from 70 mph, with the Audi trailing slightly. All halt impressively, underscoring high-caliber hardware.
Chassis Dynamics: Where Handling Magic Happens
Beyond numbers, these cars shine on twisty roads. The **Alpine A110**’s 1,103 kg kerb weight and mid-engine layout deliver telepathic balance, dancing over undulations with minimal body roll. Its independent double-wishbone suspension tunes for compliance without sacrificing sharpness.
The **Porsche 718 Cayman S** sets the handling gold standard. Mid-engine RWD poise, PASM adaptive dampers, and PTV rear-axle steering (optional) make it a scalpel on apexes. Torque from low revs lets drivers exploit the chassis without constant paddling.
**Audi TT RS** relies on quattro for point-and-shoot confidence, but its 1,440 kg heft dulls feedback compared to the lighter duo. It’s the fastest in a straight line yet feels less involving on flowing B-roads.
Lap time data from independent tests reinforces this: Alpine A110 S variants edge the Cayman at Hockenheim (1:59.20 vs 1:59.80), while braking edges vary by model.
Efficiency and Practicality: Beyond the Track
Surprisingly frugal for their ilk, but boot space and range differ.
| Spec | Alpine A110 | Audi TT RS | Porsche 718 Cayman S |
|---|---|---|---|
| Test MPG / Range | 34.4 / 341 miles | 23.0 / 278 miles | 24.6 / 346 miles |
| CO2 / Road Tax | 138 g/km / £450 | N/A | 167 g/km / £450 |
| Boot (front/rear) | 100/96 L | 305 L (rear) | 150/275 L |
| Fuel Tank | 45 L | 55 L | 64 L |
| Kerb Weight | 1,103 kg | 1,440 kg | 1,385 kg |
Alpine leads efficiency at 34.4 mpg, nearly diesel-like for a sports car. Porsche offers the longest range; Audi lags. Practicality favors Audi’s hatchback boot, while Porsche’s frunk + rear beats Alpine’s tiny twins.
Interior Comfort and Tech: Daily Driver Credentials
Alpine’s cockpit feels bespoke, with supportive seats and a driver-focused dash, though digital gauges are basic. Ride quality absorbs bumps best, ideal for spirited commutes.
Porsche’s cabin exudes quality—leather, Alcantara, and the flawless 7-inch touchscreen. PDK shifts lightning-fast; optional sport seats grip like vices.
Audi’s Virtual Cockpit shines, with intuitive MMI and premium materials. Quattro smooths imperfections, but heft shows in tight turns. All offer Apple CarPlay/Android Auto.
Pricing and Ownership: Value Verdict
- Alpine A110: £51,805 – Best entry price, low running costs.
- Porsche 718 Cayman S PDK: £53,853 – Premium badge, strong residuals.
- Audi TT RS: ~£55,000+ – Power premium, higher fuel bills.
Alpine undercuts rivals, with superior mpg offsetting tax parity. Porsche holds value best; Audi appeals to tech lovers.
Real-World Road Test Insights
On Pennine twisties, A110’s lightness shines, carving lines with precision. Cayman’s chassis communicates every nuance; TT RS blasts forward but lacks poetry. Top-gear rolls favor Porsche’s low-end shove.
Pros and Cons at a Glance
| Car | Pros | Cons |
|---|---|---|
| Alpine A110 | Lightest, most efficient; supreme balance | Limited power/boot; less prestige |
| Audi TT RS | Brutal acceleration; epic engine note | Heaviest; thirstiest; less agile |
| Porsche 718 Cayman S | Handling benchmark; flexible power | Pricey options; flat-four divisive |
Which One Wins?
The **Porsche 718 Cayman S** claims overall victory for its all-around excellence—blistering pace, unmatched dynamics, and usability. Alpine A110 steals hearts as the purest driver’s car on a budget; TT RS for straight-line thrills. Your pick depends on priorities: agility (Alpine), power (Audi), or perfection (Porsche).
Frequently Asked Questions (FAQs)
Which car is fastest in a straight line?
The Audi TT RS leads 0-60 mph thanks to AWD, but Porsche excels in real-road in-gear acceleration.
Is the Alpine A110 worth the hype?
Yes, its lightweight design delivers engaging handling at a competitive price.
How do they compare on fuel economy?
Alpine tops at 34.4 mpg, followed by Porsche; Audi is least efficient.
Best for track days?
Porsche 718 Cayman S, with superior lap balance and braking.
Daily usability winner?
Audi for boot space; Porsche for range and refinement.
References
- Alpine A110 vs Audi TT RS vs Porsche 718 Cayman — Auto Express. 2018. https://www.autoexpress.co.uk/car-reviews/103564/alpine-a110-vs-audi-tt-rs-vs-porsche-718-cayman
- Alpine A110 v Porsche 718 Cayman S v Audi TT RS supertest review — Evo Magazine. 2018. https://www.evo.co.uk/supertest/21777/alpine-a110-v-porsche-718-cayman-s-v-audi-tt-rs-supertest-review
- Porsche 718 Cayman vs Alpine A110 S — FastestLaps.com. N/A. https://fastestlaps.com/comparisons/s85ajfa236vv

