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2026 Cars8 MIN

2026 German Sports Sedan Price Showdown: BMW M340i vs. Audi S5 vs. Mercedes-AMG C 43

The 2026 rear-wheel-drive BMW M340i is the least expensive of these three German performance sedans by published U.S. starting MSRP, but drivetrain, options and dealer fees can change the real-world ranking.

By CarCody Team

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The rear-wheel-drive 2026 BMW M340i Sedan is the most affordable of these three German performance sedans on published U.S. starting MSRP. BMW lists it at $62,300, compared with $63,300 for the 2026 Audi S5 and $64,150 for the 2026 Mercedes-AMG C 43 Sedan. Each clears the 250-horsepower requirement, but the comparison is only a starting-price ranking—not an out-the-door quote or a universal worldwide result.

The three cars at a glance

The figures below use each manufacturer’s U.S. model-year 2026 starting price. The BMW price is specifically for rear-wheel drive; its available xDrive version is a different configuration. Taxes, registration, dealer fees, options and market adjustments are not included.

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Model Published U.S. starting MSRP Horsepower Drivetrain and notable specification Price position
2026 BMW M340i Sedan (rear-wheel drive) $62,300 386 hp 3.0-liter M TwinPower Turbo inline-six with 48V mild-hybrid technology; M Sport Differential and M Sport Brakes listed by BMW Baseline
2026 Audi S5 $63,300 362 hp Turbocharged V6; the cited Audi listing does not state a comparable drivetrain detail $1,000 above BMW
2026 Mercedes-AMG C 43 Sedan $64,150 416 hp 2.0-liter inline-four with hybrid assist and electric exhaust-gas turbocharger; AMG SPEEDSHIFT MCT 9-speed transmission; AMG Performance 4MATIC all-wheel drive $1,850 above BMW

Sources: BMW USA 3 Series Sedan, Audi USA S5 listing, and Mercedes-Benz USA C 43 listing. Horsepower and MSRP figures are the manufacturers’ stated 2026-model information.

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How the affordability test is defined

“Most affordable” here means the lowest published starting MSRP among a performance-oriented sedan from each brand that exceeds 250 hp. It does not mean the lowest-priced sedan in every brand, the lowest negotiated transaction price, or the lowest long-term ownership cost.

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Keeping the market and model year constant makes the initial comparison reasonably consistent. It does not make the cars mechanically identical. The BMW entry is rear-wheel drive, Mercedes specifies all-wheel drive, and the cited Audi page does not provide a matching drivetrain description for this comparison. Their engines, transmissions and included equipment also differ.

The $1,000 BMW-to-Audi spread and $1,850 BMW-to-Mercedes spread apply only to the listed base configurations. Adding options, choosing a different drivetrain, paying a dealer adjustment or shopping in another country can change the ranking.

2026 BMW M340i Sedan: the lowest entry price

What the $62,300 figure represents

BMW lists the rear-wheel-drive 2026 M340i Sedan at a $62,300 starting MSRP and rates it at 386 hp. The cited BMW specification uses a 3.0-liter M TwinPower Turbo inline-six with 48V mild-hybrid technology. BMW also identifies an M Sport Differential and M Sport Brakes among the performance equipment associated with the model.

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That is the configuration that earns BMW the lowest price in this three-car comparison. The manufacturer separately lists the M340i xDrive at $64,300. Selecting xDrive therefore adds $2,000 to the rear-drive starting price and removes the specific price advantage used in the headline ranking.

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What to verify on a dealer quote

Ask the retailer to identify “M340i Sedan, rear-wheel drive” on the worksheet. A quote that silently substitutes xDrive, adds packages or includes accessories is no longer the $62,300 configuration. BMW cautions that its published MSRP may not match a dealer’s sale price and excludes tax, title, license, registration and adjusted market value.

BMW’s equipment description gives this car a documented performance hardware baseline, but the available material does not establish an equivalent standard-equipment inventory for the Audi and Mercedes. It would be misleading to call the BMW the best overall value solely from its lower entry price.

2026 Audi S5: a $1,000 step up

Price and output

Audi USA lists the 2026 S5 at a $63,300 starting price and 362 hp. Audi describes a turbocharged V6 in the cited S5 material. That places the S5 $1,000 above the rear-drive M340i while still comfortably exceeding the 250-hp threshold.

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Why the number is not a complete value judgment

The Audi listing used for the price and power figures does not supply a directly comparable drivetrain specification in the available information. Do not infer that its configuration is equivalent to BMW’s rear-drive car or Mercedes’ all-wheel-drive car. Confirm the drivetrain, standard wheels, brakes, driver-assistance features and destination charge on the current build sheet before comparing two specific vehicles.

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Audi’s page is the authority for its own listed MSRP and output. The page path references an overview, so buyers should confirm that the displayed vehicle is the 2026 model they intend to order and that the price has not changed.

2026 Mercedes-AMG C 43 Sedan: the highest price and power

What Mercedes includes in its specification

Mercedes-Benz lists the 2026 AMG C 43 Sedan at $64,150 MSRP and 416 hp. Its stated powertrain is a 2.0-liter inline-four with hybrid assist and an electric exhaust-gas turbocharger. Power goes through an AMG SPEEDSHIFT MCT 9-speed transmission to AMG Performance 4MATIC all-wheel drive.

That makes the C 43 the most powerful of these three entries on the manufacturers’ listed figures, while also making it the most expensive at the starting point. Its $1,850 premium over the rear-drive BMW is a published-MSRP difference, not a prediction of the amount you will pay at a particular store.

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Do not substitute the regular C 300

Mercedes-Benz also lists the ordinary C 300 sedan at $49,650 and 255 hp on its C-Class sedan page. That car exceeds 250 hp and would be cheaper than all three performance models here, but it is not the AMG C 43 and does not represent Mercedes’ performance-oriented sedan line used in this comparison. The C 300 changes the answer only if “German sports sedan” is defined as any sedan above 250 hp rather than the brands’ explicitly sporty submodels.

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Mercedes’ model information can be checked in the Mercedes-Benz USA media newsroom, while the regular C-Class pricing appears on the C-Class sedan page.

What the price gap does—and does not—tell you

The ranking is clear at the base MSRP

With the defined configurations, the order is BMW, Audi, then Mercedes. BMW’s rear-drive M340i starts $1,000 below the Audi S5 and $1,850 below the AMG C 43. The Audi is $850 below the Mercedes. All three deliver substantially more than 250 hp, so none fails the power requirement.

Horsepower is not a cost-per-horsepower test

The published figures are 386 hp for BMW, 362 hp for Audi and 416 hp for Mercedes. Dividing price by horsepower would create a different, highly simplified metric and would still ignore drivetrain, braking hardware, transmission design, warranty coverage, insurance and fuel use. The available manufacturer pages do not provide a common equipment or lifecycle-cost dataset, so this article does not claim that one car is cheaper to own or better equipped.

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Drivetrain changes the comparison

The BMW’s winning price is tied to rear-wheel drive. BMW’s xDrive M340i starts at $64,300, which is above the Audi’s listed starting price and only slightly above the Mercedes’ listed MSRP. Mercedes specifies all-wheel drive as standard for the C 43. Because the Audi drivetrain is not stated in the cited material, a true like-for-like drivetrain ranking requires a current Audi build sheet.

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Why starting MSRP is not your final purchase price

Manufacturer MSRP is a useful first filter, but it is not an out-the-door quote. BMW explicitly notes that its online MSRP excludes several charges and may differ from a dealer’s selling price. The same practical caution applies when using the Audi and Mercedes figures as shopping benchmarks.

  • Taxes: State and local sales taxes vary by registration location.
  • Title, license and registration: Government charges depend on the jurisdiction and vehicle transaction.
  • Destination and documentation charges: Confirm whether the displayed configurator total includes every delivery and dealer fee.
  • Options and packages: Paint, wheels, interior upgrades, driver-assistance packages and performance equipment can move a car far above its advertised starting point.
  • Dealer pricing: Discounts, markups, mandatory accessories and financing conditions can make two apparently similar cars transact at very different prices.
  • Inventory: The exact configuration available locally may not be the base version used in the comparison.

For that reason, treat the three numbers as a screening tool. Request itemized buyer’s orders for the same state, the same purchase method and similarly equipped cars before deciding that a $1,000 or $1,850 difference will survive to the final check.

A practical way to shop the three sedans

  1. Start with the exact trim. Tell each retailer you want a 2026 BMW M340i Sedan in rear-wheel drive, a 2026 Audi S5 and a 2026 Mercedes-AMG C 43 Sedan. Do not accept a generic “3 Series,” “A5” or “C-Class” quote.
  2. Record the advertised base price. Save the manufacturer page and the date you viewed it. Manufacturer pricing can change, and the listed BMW, Audi and Mercedes pages are the references for their own figures.
  3. Normalize the configuration. Write down drivetrain, engine, transmission, wheels, brakes, packages and destination charge for each vehicle. The BMW xDrive price is not interchangeable with rear drive, and Mercedes’ standard 4MATIC specification is not the same drivetrain as BMW’s base comparison car.
  4. Build an itemized local quote. Ask for selling price, dealer-installed accessories, documentation fee, destination charge, taxes, title, registration and any financing requirement on separate lines.
  5. Check the horsepower source. Keep the manufacturer-rated figures with the configuration: 386 hp BMW, 362 hp Audi and 416 hp Mercedes. A dealer listing that shows a different output may refer to another model year or trim.
  6. Compare ownership inputs separately. Obtain insurance estimates, fuel-economy information, tire and brake pricing, warranty terms and maintenance schedules before making a lifecycle-cost claim. Those items are not established as a common comparison by the cited MSRP pages.
  7. Recheck the model year at signing. A leftover prior-year car, a 2027 vehicle or a used example can carry a different price and specification even when the badge looks nearly identical.

Which buyer benefits from each starting configuration?

Choose the BMW configuration when the entry price is the priority

The rear-drive M340i is the logical starting point for a buyer who wants the lowest published MSRP among these three performance sedans and is comfortable with rear-wheel drive. Its listed 386 hp and documented M Sport hardware make it more than a 250-hp compliance choice. Confirm that the dealer has not changed the drivetrain or added packages before relying on the base price.

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Choose the Audi when its specification and transaction quote fit better

The S5 asks $1,000 more than the rear-drive BMW and lists 362 hp. A buyer considering it should focus on the actual drivetrain and standard equipment shown on the current build sheet, because the cited overview does not establish a directly comparable equipment or drivetrain package.

Choose the Mercedes when its power and all-wheel-drive specification justify the premium

The AMG C 43 carries the highest starting MSRP and the highest listed horsepower. Its stated 4MATIC all-wheel-drive system, hybrid-assisted turbocharged four-cylinder and AMG transmission define a different mechanical package from the rear-drive BMW. Whether those features justify the premium depends on the buyer’s priorities and the final local quote, not on horsepower alone.

Verdict: BMW wins the narrowly defined affordability question

For a 2026 U.S. buyer comparing these brands’ performance-oriented sedans strictly by published starting MSRP, the rear-wheel-drive BMW M340i Sedan is the answer. Audi’s S5 costs $1,000 more to start, and Mercedes’ AMG C 43 costs $1,850 more. That conclusion changes if you compare BMW’s $64,300 xDrive version, include dealer and government charges, evaluate standard equipment, or broaden the field to Mercedes’ $49,650 C 300. Use the base prices to identify a starting point, then make the purchase decision from matching, itemized quotes.

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

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2026 CarsAudi S5BMW M340iCar PricingGerman sports sedansMercedes-AMG C 43

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