New Alfa Romeo Giulia Quadrifoglio vs new Mercedes-AMG C63 S: costs

Both of these high performance saloons produce more than 500bhp, and both have recently been updated. Let's see which is the better buy...

Alfa Romeo Giulia Quadrifoglio side

Buying and owning

Costs, equipment, reliability, safety and security

Unsurprisingly, all that poke means hefty fuel bills; in our economy tests, the C63 managed just 25.5mpg and the Giulia a wallet-wilting 23.7mpg.

Still, the Giulia offets this somewhat by costing a whopping £9740 less to buy outright after you’ve factored in the discounts available (either by haggling or via our online New Car Buying service). What's more, it’s projected to shed its value at a slower rate and is slightly cheaper to insure and service. Overall, then, it will suck around £8500 less out of your wallet over three years of ownership.

Mercedes-AMG C63 S side

Similarly, on a 36-month PCP finance deal with a £7000 deposit and a 10,000-mile annual limit, the Giulia is considerably cheaper, thanks in part to a healthy deposit contribution from Alfa Romeo. It’ll cost you £736 per month when bought this way, compared with the C63’s £1060.

There’s little to separate the two for standard equipment: two-zone climate control, 19in wheels, heated front seats and ambient lighting are included with both, as is automatic emergency braking. However, the Giulia adds blindspot monitoring. Lane-keeping assistance and adaptive cruise control are optional on both.

Alfa Romeo Giulia Quadrifoglio vs Mercedes-AMG C63 S costs

Both occupy the top (37%) benefit-in-kind tax bracket, so the C63 will cost a company car driver who pays 40% tax £894 a month and the Giulia £805.

In the 2020 What Car? Reliability Survey, meanwhile, the regular Giulia finished mid-table but ranked rather higher than the C-Class.

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