BMW 4 Series vs Audi A5 vs Lexus RC
Discover which premium coupe excels in performance, comfort, efficiency and value in this head-to-head showdown between BMW, Audi and Lexus.
BMW 4 Series vs Audi A5 vs Lexus RC: Premium Coupe Battle
In the competitive world of luxury coupes, the BMW 4 Series, Audi A5 and Lexus RC stand out as top contenders. These vehicles blend stylish designs with advanced technology and refined driving experiences, appealing to buyers seeking both performance and everyday usability. This analysis dives into their key attributes, from powertrains and acceleration to interior quality and long-term costs, based on real-world testing data.
Overview of the Contenders
The BMW 420i M Sport enters as the newest model, featuring a bold grille and sporty stance. Powered by a 2.0-litre turbocharged petrol engine producing 181bhp, it pairs with an eight-speed automatic transmission and rear-wheel drive. Priced from around £40,460, it emphasizes dynamic handling.
The Audi A5 40 TFSI S line counters with a slightly more potent 2.0-litre turbo unit at 201bhp, linked to a seven-speed dual-clutch gearbox and front-wheel drive. Starting at £41,805, it prioritizes smooth power delivery and premium cabin tech.
The Lexus RC 300h F Sport is the hybrid option, combining a 2.5-litre petrol engine with electric motors for a total system output equivalent to 220bhp in some metrics, though combined at 181bhp for direct comparison. Its CVT transmission and rear-wheel drive aim for efficiency, with a base price of £43,500.
Performance and Acceleration Breakdown
Straight-line speed favors the Audi A5, which accelerates from 0-62mph in 7.1 seconds thanks to its higher power-to-weight ratio—it’s the lightest at around 1,500kg despite the extra horsepower. The BMW 420i and Lexus RC 300h tie at 7.5 seconds, but the BMW’s engine feels more responsive in mid-range pulls due to its torque curve peaking at 300Nm from 1,350rpm.
The Lexus hybrid delivers seamless power but lacks the urgency of its rivals, with the CVT holding revs during hard acceleration, which can feel noisy under full throttle. In everyday scenarios, the Audi’s muscular low-end torque (320Nm from 1,450rpm) makes overtaking effortless.
| Model | Power (bhp) | Torque (Nm) | 0-62mph (sec) |
|---|---|---|---|
| BMW 420i M Sport | 181 | 300 | 7.5 |
| Audi A5 40 TFSI S line | 201 | 320 | 7.1 |
| Lexus RC 300h F Sport | 181 (system) | N/A | 7.5 |
Transmission and Drivetrain Insights
BMW’s eight-speed automatic shines for its quick shifts and adaptability. In comfort mode, it glides smoothly; switch to sport, and it holds gears longer for spirited drives. However, it can jolt at low speeds in sport mode.
Audi’s seven-speed dual-clutch is refined, matching the engine’s surge without hesitation, making it ideal for relaxed cruising or brisk overtakes.
Lexus’s CVT, while efficient, drones under load and dulls the driving thrill, prioritizing smoothness over engagement. All models use rear-wheel drive except the front-driven Audi, which still grips well.
Handling and Ride Quality Comparison
The BMW 4 Series leads in driving fun, with precise steering, balanced chassis and composed cornering. Its M Sport suspension strikes a balance between sharpness and compliance, absorbing bumps better than expected on 19-inch wheels.
Audi A5 offers grippy handling with light, accurate controls, but it’s more all-rounder than pure sports car. The ride is firm, transmitting some road harshness.
Lexus RC grips securely but feels detached, with numb steering and less body control. Its ride is the plus, marginally plusher than the Audi’s despite similar wheel sizes.
- BMW 4 Series: Sportiest dynamics, best steering feedback.
- Audi A5: Balanced grip, comfortable for daily use.
- Lexus RC: Smoothest ride, but least engaging.
Interior Design and Technology Features
Audi’s cabin impresses with high build quality, intuitive touchscreen and digital gauges. Materials feel premium, though rear space is tight.
BMW’s interior is driver-focused, with a curved display and iDrive system that’s responsive. It’s comfortable upfront, with good adjustability.
Lexus offers a luxurious feel with soft-touch surfaces, but the infotainment lags, and the trackpad controller frustrates. Safety tech includes adaptive cruise and lane assist.
Practicality and Space Evaluation
Coupes sacrifice space, but the BMW provides the most rear legroom and a 445-litre boot with a ski hatch. Audi’s 465-litre trunk is largest and most accessible, though headroom suffers.
Lexus trails with cramped rears and a smaller boot, prioritizing style over utility. All seat four, but adults fit best upfront.
Fuel Economy and Running Costs Analysis
Hybrid Lexus shines in urban cycles at 42.2mpg test economy (613-mile range), but overall WLTP figures (44.1-45.5mpg) barely edge rivals. BMW hit 36.3mpg, Audi 32.2mpg in tests.
Ownership favors BMW with best residuals (51.7% after 3 years), lowest depreciation. Lexus holds value well (49.3%), Audi weakest (39.8%). Road tax: £465 for Lexus (145g/km CO2), similar for others.
| Model | Price (as tested) | Residual (%) | Test MPG | CO2 (g/km) |
|---|---|---|---|---|
| BMW 420i M Sport | £48,925 | 51.7 | 36.3 | ~150 |
| Audi A5 40 TFSI | £47,600 | 39.8 | 32.2 | ~150 |
| Lexus RC 300h | £45,020 | 49.3 | 42.2 | 145 |
Safety and Driver Assistance Systems
All include autonomous emergency braking, lane-keeping and adaptive cruise. Lexus packs comprehensive aids standard. BMW and Audi offer optional upgrades, with strong crash ratings from Euro NCAP (five stars each, per official data).
Which One Wins Overall?
BMW 4 Series claims victory for its engaging drive, comfort and value retention, ideal for enthusiasts. Audi excels in power and tech for refined users. Lexus suits efficiency seekers but lags in excitement.
Frequently Asked Questions (FAQs)
Which has the best fuel economy?
The Lexus RC 300h leads with 42.2mpg in tests, thanks to its hybrid system.
Is the BMW the sportiest?
Yes, its handling and transmission make it the driver’s choice.
How practical are these coupes?
Audi offers the biggest boot; BMW best rears. All prioritize style over family use.
What about reliability?
Lexus typically tops dependability charts; BMW and Audi require diligent maintenance.
Which is cheapest to own?
BMW, due to strong residuals and balanced costs.
References
- BMW 4 Series vs Audi A5 vs Lexus RC — Auto Express Test — BMWBlog. 2020-11-23. https://www.bmwblog.com/2020/11/23/bmw-4-series-vs-audi-a5-vs-lexus-rc-auto-express-test/
- BMW 4 Series vs Audi A5 vs Lexus RC — Auto Express. 2020-11-21. https://www.autoexpress.co.uk/car-group-tests/353692/bmw-4-series-vs-audi-a5-vs-lexus-rc
- Audi A5 vs Mercedes C-Class Coupe vs BMW 4 Series vs Lexus RC — Carwow. N/A. https://www.carwow.co.uk/blog/audi-a5-vs-mercedes-c-class-coupe-vs-bmw-4-series-vs-lexus-rc-video-group-test
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