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From the May 1997 edition of Car and Driver, this feature explores the specialized world of Ruf Automobile GmbH, a renowned Porsche tuner. While Porsches are inherently high-performance machines, Ruf takes their capabilities to an even higher echelon, offering extensive modifications that cater to the most demanding automotive enthusiasts. This article provides an in-depth look at two of their notable creations: the 993BTR and the RCT, showcasing how these vehicles push the boundaries of speed and agility.

The Ruf 993BTR: A Two-Wheel-Drive Powerhouse

The Ruf 993BTR exemplifies the tuner's engineering prowess, transforming a standard rear-wheel-drive Porsche 911 Carrera 2 into a formidable supercar. At the heart of the BTR is a comprehensive engine conversion kit that includes a single turbocharger, intercooler, performance camshafts, an upgraded exhaust system with freer flow, and recalibrated fuel injectors managed by a revised Bosch Motronic controller. This extensive overhaul, coupled with custom hoses, brackets, and an additional oil cooler, results in a staggering 420 horsepower and 420 pound-feet of torque. To handle this immense power, Ruf mandates a specialized suspension kit and 18-inch performance tires, ensuring the chassis can cope with the increased output and deliver a superior driving experience.

The total cost for these modifications, including parts and installation, positions the 993BTR as a significant investment. However, its performance figures—such as an identical 0 to 60 mph time of 3.7 seconds compared to the all-wheel-drive 911 Turbo, and a faster quarter-mile time—demonstrate its remarkable capabilities. Beyond raw speed, the BTR offers a distinct driving feel; its enhanced suspension reduces understeer and makes the tail more responsive to power inputs, particularly at high speeds. The power delivery is described as an exhilarating surge, providing a more immediate and thrilling thrust than the factory Turbo, with minimal turbo lag. This bespoke tuning transforms the 911 into a uniquely agile and powerful machine, appealing to those who desire a more visceral and engaging driving experience.

The Ruf RCT: Reigniting Classic Porsche Performance

For owners of older Porsche models seeking a performance upgrade rather than a new vehicle, Ruf offers solutions like the RCT package. This modification, designed for previous-generation 911s, demonstrates Ruf's ability to imbue classic Porsches with modern-day performance. The RCT package, similar in concept to the BTR, features an intercooled single-turbo engine, delivering 380 horsepower and 395 pound-feet of torque. These significant power gains over the naturally aspirated stock engine are complemented by essential upgrades, including 18-inch wheels and tires, an enhanced suspension system, and optional braking and transmission improvements.

A notable example of the RCT's impact is its application to a 1994 RS America, a lighter variant of the 911. This combination results in a car that feels exceptionally dynamic and responsive. The RCT's power delivery is intense, capable of breaking traction in the lower gears, and it maintains impressive acceleration through to higher speeds. While it might be slightly slower off the line than the BTR, its superior aerodynamics allow it to achieve higher velocities in the quarter-mile and reach 150 mph faster. Further enhancements, such as Ruf windshield A-pillar inserts that reduce drag, contribute to an estimated top speed of 193 mph, a substantial increase over the stock RS America. The RCT proves that with Ruf's meticulous attention to detail, even older Porsches can be transformed into high-performance marvels, offering a thrilling alternative to purchasing a new, faster vehicle.

Experience Unrivaled Luxury and Performance: The Mercedes-Benz E450 Journey

Initial Impressions: Unveiling the E450's Inherent Luxury and Refinement

From the moment this long-term 2026 Mercedes-Benz E450 arrived, it continuously showcased the reasons behind its two-year consecutive placement on our 10Best list. The initial period, dedicated to a gentle 1000-mile break-in, underscored its inherent ride refinement and sophisticated nature, earning widespread acclaim within our team for its exceptional comfort and overall poise.

Dynamic Performance: Pushing the E450 Beyond Initial Limits

Once the initial break-in period concluded, the E450's performance capabilities were thoroughly explored. Despite its almost 'floaty' feel during urban driving, the vehicle maintains remarkable stability and composure even when driven assertively on challenging roads. Its impressive skidpad grip of 0.92 g and a stopping distance of 157 feet from 70 mph demonstrate its robust handling and braking prowess, matching even high-performance models in its class.

Power and Efficiency: The E450's Inline-Six Engine Advantage

The E450's inline-six engine, paired with all-wheel drive, not only offers smooth power delivery and a pleasing auditory experience but also boasts extraordinary fuel efficiency. During our 75-mph highway fuel economy test, the E450 achieved an impressive 39 mpg, significantly surpassing its EPA highway rating. This, combined with its substantial 17.4-gallon fuel tank, allows for extended driving ranges. Even with spirited driving, its average fuel consumption remains excellent, delivering remarkable performance—a swift 0-60 mph in 4.5 seconds and a quarter-mile in 12.9 seconds—while maintaining commendable efficiency.

Interior Ergonomics: Navigating the Advanced Controls

While the E450's driving experience is largely celebrated, the touch-sensitive controls on its steering wheel have proven to be a point of contention. Adjusting functions such as volume or cruise control often requires frustratingly imprecise swipes, frequently leading to either no response or an over-adjustment, rarely providing the exact desired input, which detracts from an otherwise seamless interior.

Optional Enhancements: Customizing the E450 Experience

Our long-term E450 arrived fully equipped with numerous options, elevating its price significantly from the base model. While some features like the front passenger screen, selfie camera (part of the Superscreen package), and the 3-D gauge cluster display were deemed less essential by many, certain upgrades stood out as worthwhile investments. The Pinnacle trim, offering a premium 21-speaker Burmester sound system, and the air springs, which enhance ride quality, were highly valued. Additional practical options, such as heated armrests, steering wheel, rear seats, and washer nozzles, were also appreciated for winter conditions, with soft-close doors being the only missed feature. The Verde Silver Metallic paint and 20-inch AMG multi-spoke wheels also provide a significant visual upgrade.

Public Reception and Ownership Outlook

Despite its understated elegance, the E-class consistently attracts positive attention and admiration from onlookers. Our team wholeheartedly agrees with these sentiments, recognizing it as a truly exceptional luxury sedan. We eagerly anticipate continued long-term testing to further evaluate the ownership experience and solidify our appreciation for this remarkable vehicle.