Over the past decade, the new car market has been flooded with a plethora of compelling luxury cars and SUVs from various brands. Consumers are demanding more premium and upmarket models at an accelerated rate, but this has partly led to new car prices rising to astronomical levels, especially in the luxury segment. Inversely, this has also resulted in the very same cars being subject to drastic depreciation levels, especially if theyfeature any form of electrification.When new, the 2021 Porsche Cayenne Turbo S E-Hybrid in both SUV and coupe form was a highly priced model, but considering its standard specification and incredible performance returns, it was well worth the asking price. Due to the aforementioned value retention rates, this five-year-old luxury performance PHEV SUV is still fairly expensive, but still an absolute bargain, especially when compared to today's new vehicles, which it still vastly outperforms. The Cayenne Turbo S E-Hybrid - Porsche's Hypercar-Rivaling Luxury SUV PorscheWhen new in 2021, a base Porsche Cayenne Turbo S E-Hybrid before any options fitted would have cost you $111,600. According to J.D. Power, the very same model will cost you anywhere between $88,732 and $96,559, with a $91,865 sales price average on the used market today.This is an impressive value retention rate that outperforms estimates from varying publications and analytics. iSeeCars suggests that this model will go on to lose $41,917 or 49.5 percent of its value over the next five years and 60,000 miles, which is about five percent better than some of its main rivals.Edmunds indicates that in total, this same model will cost you $122,260 to own over five years and 60,000 miles, with $46,114 accounting for depreciation, $9,607 for maintenance, $13,281 for repairs, and $22,200 for fuel. According to RepairPal, the annual maintenance cost for a 2021 Porsche Cayenne is approximately $1,231. CarEdge estimates a higher 10-year average of $2,055 per year. Kelley Blue Book does not provide a single annual figure but suggests budgeting between $2,300 and $5,000 annually for maintenance and repairs. Reasonable Reliability For A Performance Model PorscheThe 2021 Porsche Cayenne Turbo S E-Hybrid is a mechanically technical SUV, so reliability and maintenance will be intensive, especially if you use the full potential of its drivetrain on a regular basis. iSeeCars suggests that this model will benefit from an average lifespan of 11.9 years or 123,646 miles with a 7.6 percent probability of reaching 200,000 miles.J.D. Power's valuation covers the entire Cayenne range, boasting an 81/100 score for quality and reliability, 85/100 for the driving experience, 75/100 for resale, and 93/100 for the dealership experience, bringing its consumer-verified overall score up to 83/100. iSeeCars backs this with an 8.0/10 overall score, including 8.2/10 for reliability and 7.8/10 for retained value. An Upmarket Performance Interior PorscheThe 2021 Porsche Cayenne Turbo S E-Hybrid's interior perfectly balances its high-performance DNA with sophisticated comfort. Standard equipment includes an 18-way Adaptive Sport Seats Plus, featuring memory settings and integrated headrests, alongside a heated multifunction steering wheel and dual-zone climate control with an auxiliary air conditioning system that allows for remote pre-cooling. The glass cockpit design boasts a 12.3-inch Porsche Communication Management touchscreen, which includes online navigation, a 4G LTE Wi-Fi hotspot, and wireless Apple CarPlay. If you're an audiophile, you are sure to appreciate the standard 14-speaker Bose Surround Sound System delivering 710 Watts. For convenience, the model includes a power tailgate, a panoramic sunroof, and the Sport Chrono Package, which adds a dash-mounted analog stopwatch and steering-wheel-mounted drive mode selectors. An Extensive List Of Optional Extras PorscheLike the 2026 model, the customization potential was immense, as Porsche offered an extensive list of high-priced optional extras. For enhanced comfort, a common feature was the massage function for the front seats, priced at $2,000, while seat ventilation for both front and rear would have added $1,700 to the total cost. The standard audio could be swapped for the pinnacle Burmester 3D High-End Surround Sound System, which cost a staggering $5,810 in 2021.For rear passengers, the Porsche Rear Seat Entertainment system, consisting of dual 10-inch high-resolution displays, was available for $1,920. Interior aesthetics could be further elevated with the deviated stitching interior package, starting at around $5,010, or specialized trims like Anthracite Chestnut with aluminum inlays for $1,460. Technology-focused extras included the head-up display for $1,720 and the night vision assist infrared camera for $2,420. This displays thermal images of pedestrians or animals directly on the instrument cluster. Even smaller details commanded premium prices, such as the smartphone compartment with wireless charging for $690 and comfort access keyless entry for $890. Porsche's Ultra-Technical PHEV System PorscheThe 2021 Porsche Cayenne Turbo S E-Hybrid features a sophisticated plug-in hybrid drivetrain centered around the Volkswagen Group's 4.0-liter twin-turbo V-8 engine, complemented by a single 100 kW permanent-magnet synchronous electric motor. This combination produces 670 horsepower and 663 pound-feet of torque sent to an all-wheel drive system via an eight-speed Tiptronic S automatic transmission.Despite a hefty curb weight of 5,600 pounds, the electrified assistance allows for a 0 to 60 MPH time of just 3.6 seconds before reaching a top track speed of 183 MPH. In terms of straight-line dominance, it typically clears the quarter-mile in 11.5 seconds. Porsche's Incredible Attention To Detail Porsche The 2021 Porsche Cayenne Turbo S E-Hybrid’s powertrain is an engineering marvel, utilizing a parallel full hybrid architecture. The V-8 engine is crafted from high-strength aluminum alloy and features a hot inner V design, where the twin-scroll turbochargers are placed between the cylinder banks to shorten exhaust paths, resulting in near-instantaneous throttle response but riskier heat dissipation. In isolation, the engine produces 541 horsepower, partly thanks to its gasoline direct injection and a specialized thermal management system with a potted water pump for optimal cooling.Porsche inserts the motor between the engine and transmission. This produces 134 horsepower via an electromagnetically operated decoupling clutch that allows the SUV to transition seamlessly between pure electric and combined drive modes. Porsche also reinforces the Tiptronic S transmission to handle the increased torque output, while also including an integrated oil cooler and its Porsche Traction Management active all-wheel-drive system featuring a map-controlled multi-plate clutch to vary power distribution between the front and rear axles to optimize grip and acceleration levels. Supercar-Level Fuel Consumption Estimates PorscheThe 2021 Porsche Cayenne Turbo S E-Hybrid may feature electrification, but it is anything but fuel-efficient. According to the EPA's estimates, the model consumes 42 MPGe when running on electricity and gasoline, 82 kWh per 100 miles when using the electrical system, and just 18 MPG when the V-8 is running in isolation. The compact battery covers the SUV for 14 miles on its own, while the gasoline system is able to squeeze 370 miles of range from the 19.8-gallon gasoline tank.This means that you can expect to spend $5,500 more on fuel compared to the average new vehicle sold in the U.S. today, as well as $2,700 on gasoline and electricity every year, $4.01 to charge the battery, $5.40 to drive 25 miles using gasoline only, and $77 to fill the tank.