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The 2013 Porsche Carrera 4 featured a 3.4-liter flat-six engine. It was mated as standard to a world's first seven-speed manual transmission. An automatic, PDK (dual-clutch) transmission was offered as an option. The Carrera 4 featured an all-wheel-drive torque distribution in the instrument cluster display. The most distinctive identifying feature of the 911 with all-wheel drive is still the wide rear section: compared to the two-wheel drive 911 Carrera models, the rear wheel housings 22 mm wider, and each of the rear tires is 10 mm wider.
Porsche added the rear wheel drive Carrera 2 variant to the range in 1990. It was developed alongside the 964 Carrera 4, Porsche waited a year to release the Carrera 2 as a 1990 model year car. Like the Carrera 4, the Carrera 2 was available as a coupé, Targa or Cabriolet. Think of the cabriolet as a C2 coupe but with a fabric roof and more fun and you are right on the money. It was popular amongst buyers, particularly in the United States, with a total of 11,013 units sold, making it the third most popular 964 model. 
The new downsized flat-six gets forced induction, more power and greater efficiency, just like in the basic refreshed 911 Carrera, this time mated to a four-wheel-drive system nicked wholesale from the Turbo. Apparently one in three 911 buyers opt for a four-wheel-drive variant, so this is an important car to get right. The 3.0-liter twin-turbo flat-six in the 911 Carrera 4S is good for  414hp and 368 ft lbs of torque, helping it get from 0 to 62 mph in 4.2 sec with a manual, 4.0 seconds with the PDK and 3.6 sec with the PDK and optional Sport Chrono pack.
The Carrera S was the ultimate, naturally aspirated version of the Carrera 2. Porsche decided to offer something more to its customers when it launched the Carrera S version. It featured a stiffer and lowered suspension. Its wider tires made it better in the corners and faster around a race-track than its Carrera 2 sibling. The Carrera S took its bodywork from the Porsche Turbo. But it didn't get the turbocharger or the all-wheel-drive system. Its wider rear fenders and lowered stance than the Carrera lineup made it a desirable car for the Porsche fans. The engine was the same 3.6-liter naturally aspirated, but it was offered in the higher power output of 285 hp. The only transmission available was a 6-speed manual.
Porsche 911 ’30 Jahre’ Anniversary (964) (1993)
In March 1993, Porsche presented the Porsche 911 anniversary model “30 years 911” at the Geneva Motor Show. Since then, the special model is also called “Jubi” for short. Under the Porsche internal code M096, there is essentially a Carrera 4 with the wide turbo body but without wings. The 964 anniversary edition could be ordered with exclusive interior design and numerous possibilities of customization. According to Porsche, the special model was limited to 911 vehicles and manufactured in the model years 1993 and 1994.
1975 PORSCHE 911S SILVER ANNIVERSARY EDITION
Commemorating 25 years of Porsche sports car production, the 911S Silver Anniversary Edition is distinguished by unique Diamond Silver Metallic paint and a special black leatherette and tweed interior. The first of Porsche’s commemorative ‘celebration’ cars, this Silver Anniversary was produced in a limited run of 1,063 examples, of which approximately 500 are reported to have made their way to the United States.
In 1980, a true limited edition model 911SC was produced for the American market. The 'Weissach' edition was a standard SC with special paint. It was built in 1980 to honor the Porsche Motorsport team working in Weissach Germany. 468 units were made and half were painted Metallic Black, the other half in Platinum Metallic. The interiors were wrapped in Doric Grey leather with burgundy piping. Additional body and mechanical specs included whale tail spoiler, Bilstein dampers and Fuchs wheels.
Porsche introduced the 991 GT3 for the 2014 model year, as follow up to the multiple 997 GT3 variants. The 991 GT3 featured a new 3.8 litre direct fuel injection (DFI) flat-six engine developing 475 hp (354 kW; 482 PS) at 8,250 rpm, Porsche's Doppelkupplung (PDK) double-clutch gearbox, and rear-wheel steering. The 911 GT3 is claimed to be able to accelerate from 0-60 mph (97 km/h) in 3.1 seconds or less, and the quarter mile in 11.2 seconds at 126 mph (203 km/h). It evolved into the 991.2 GT3 for model year 2018.
Based on the 530-bhp 911 Turbo S, the special-edition Porsche has carbon-fiber trim inside and out, plus upgraded leather, badging and the exterior colors of the 918, including the use of Acid Green on the brake calipers, illuminated sill plates, interior stitching and instrument cluster needles. Also limited to 918 units, the 911 Turbo S Edition 918 Spyder will be available in Coupe ($160,700) and Cabriolet ($172,100) forms, making this one very expensive dealer option.
The sixth generation of the 911 series’ top-of-the-range model was unveiled at the 2006 Geneva Motor Show. The 997 911 Turbo has 473 bhp @ 6000 rpm, 60 bhp more than its predecessor. Rated torque is now 473 bhp @ 6000 rpm. The speed range in which this power is available has also been extended. While the previous model’s maximum torque was available between 2,700 and 4,600 revolutions per minute, the corresponding figures are now 1,950 to 5,000 revs. 0 to 60 mph is over in a blistering 3.6 seconds and top speed is 193 mph. The ultimate GT.
Based on the road-going 996 911 GT3 RS, the GT3 RSR features improvements to its predecessor in all key areas. The vehicle is available in an ACO (Automobile Club de l'Ouest) version for competing in Le Mans and in the American Le Mans Series as well as in a FIA specification. The 911 GT3 RSR features a modified front which improves downforce at the front axle. The 3.6-litre, six-cylinder boxer engine delivers 445 hp at 8,250 revs. Maximum torque is now 405 Nm at 7,200 rpm, with top revs reached at 8,500 (for the FIA specification with two 30.8 mm air restrictors). Race cars never got more exciting than this.
While the base Targa isn't the most dynamic 911, it will suit a certain buyer well. If you want the sexiest looking 911 that is a great all-rounder and you don't plan on spanking it all the time, then this is a great 911 to buy. Even in lower-powered form, the 3.0-liter is a peach of an engine. Torquey across its rev range, it responds quickly to prods of the throttle. The real problem with the Targa is the added weight and the structure, which hurts it dynamically.
Porsche 911 991 Safari Concept
The Porsche 911 Vision Safari a sports car-based rally car concept, designed and built by Porsche in 2012, based on the Porsche 911 (generation 991) and harkening back to the original car, the Porsche 911 SC Safari from 1978. Features a raised suspension, reinforced wheel housings and large bumpers.