Introduction

Audi's A4 is a svelte and sophisticated sports sedan with power and handling to make quick work of most twisty roads. But for some die-hard performance enthusiasts, the basic version is not enough. Enter the S4, a bulked-up bruiser equipped to take on all comers. Armed with a twin-turbo version of the 2.8-liter V6 used in the larger A6, plus a stiffer suspension and bigger brakes, the S4 is a world-class athlete. Yet true to its German roots, styling cues are subtle, meaning this sedan can go about its business quietly until its driver is ready to rumble.

Walkaround

The S4 is, at its core, a modified A4. Thus it retains the four-door configuration and general dimensions of the smallest sedan Audi offers in the U.S. The S4 doesn't shout its presence (unless one chooses the Imola Yellow or Nogaro Blue pearl effect paint). Visual differences from the A4 models are limited to the wheels and tires, larger air intakes at the front of the car, and xenon headlamps with clear glass covers. Aluminum mirror housings are optional. S4 Avant gets aluminum roof rails.

Interior Features

The S4 interior shares its interior design with the rest of the A4 line, which is to say the days of dark and foreboding German interiors are over. Buyers can choose from a variety of interior treatments called "Atmospheres." Our test S4 had faux carbon fiber accents, which look right at home in this high-performance sedan. Special to the S4 are sport seats with deep side bolsters designed to keep driver and passenger in place during vigorous driving. The seats are multi-adjustable and everyone should be able to get comfortable. Pearl nappa leather covers seats, armrests, and door panel inserts. The leather is available in either a dark onyx or silver; Alcantara suede inserts are available at no extra cost in either silver or a striking blue. Audi paid particular attention to the driver's office, with large round easy-to-read instruments under a blister on the dash. The steering wheel is contoured with thumb grips at the proper nine and three o'clock positions, but the surface is harder and slipperier than we'd like. The back seat is comfortable. This is a compact car, however, so rear legroom is more limited than in bigger sedans. Although there are three seatbelts in back, three adults will find shoulder room inadequate. This is a four-grownup car. The S4 Avant offers 63.7 cubic feet of storage space with the rear seats folded down.