By alley - Sep 18, 2015, 1:31 PM ET

WEC: Hartley heads Porsche's third practice 1-2 at COTA

Porsche again blocked out the top two positions in final free practice ahead of Friday afternoon's qualifying session for the Circuit of The Americas World Endurance Championship round.

Brendon Hartley went fastest in the 60-minute session with a 1m46.435s, which put him three tenths up on the sister Porsche 919 Hybrid in which Neel Jani set a 1m46.781s.

Audi, which had split the Porsches in the second session, took third position with a 1m47.436s from Loic Duval. That was seven tenths quicker than the second R18 e-tron quattro, which ended up fourth with Andre Lotterer's 1m48.207s.

The Toyota TS040 Hybrids again ended up fifth and sixth in the hands of Mike Conway and Sebastien Buemi, with times more than two-and-a-half seconds off the pace.

The Signatech Alpine squad was fastest in the LMP2 division with its ORECA-Nissan 03R. Paul-Loup Chatin's best time of 1m56.178s put him half a tenth up on Nicolas Lapierre in the KCMG ORECA-Nissan 05.

Porsche led the way in GTE Pro with Patrick Pilet. His session best of 2m05.134s aboard his Manthey-run 911 RSR was two tenths quicker than a late lap from Gianmaria Bruni in the best of the AF Corse Ferrari 458 Italias.

GTE Am was led by Aston Martin Racing driver Pedro Lamy.

THIRD PRACTICE TIMES:

Pos	Class	Driver	Team	Car	Time	Gap
1	LMP1	T.Bernhard, M.Webber, B.Hartley	Porsche Team	Porsche	1m46.435ss	1m46.435s
2	LMP1	R.Dumas, N.Jani, M.Lieb	Porsche Team	Porsche	1m46.781ss	0.346s
3	LMP1	L.di Grassi, L.Duval, O.Jarvis	Audi Sport Team Joest	Audi	1m47.436ss	1.001s
4	LMP1	M.Fassler, A.Lotterer, B.Treluyer	Audi Sport Team Joest	Audi	1m48.207ss	1.772s
5	LMP1	A.Wurz, S.Sarrazin, M.Conway	Toyota Racing	Toyota	1m49.112ss	2.677s
6	LMP1	A.Davidson, S.Buemi, K.Nakajima	Toyota Racing	Toyota	1m49.221ss	2.786s
7	LMP1	N.Prost, M.Beche, N.Heidfeld	Rebellion Racing	Rebellion/AER	1m53.115ss	6.680s
8	LMP1	A.Imperatori, D.Kraihamer, D.Abt	Rebellion Racing	Rebellion/AER	1m54.344ss	7.909s
9	LMP1	S.Trummer, P.Kaffer	Team ByKolles	CLM/AER	1m55.442ss	9.007s
10	LMP2	N.Panciatici, P-L.Chatin, V.Capillaire	Signatech Alpine	Alpine/Nissan	1m56.178ss	9.743s
11	LMP2	M.Howson, R.Bradley, N.Lapierre	KCMG	ORECA/Nissan	1m56.231ss	9.796s
12	LMP2	P.Ragues, O.Webb, A.Hamilton	Team SARD Morand	Morgan/SARD	1m56.454ss	10.019s
13	LMP2	S.Sharp, R.Dalziel, D.Hansson	Extreme Speed Motorsports	Ligier/HPD	1m56.784ss	10.349s
14	LMP2	G.Yacaman, L.Derani, R.Gonzalez	G-Drive Racing	Ligier/Nissan	1m56.855ss	10.420s
15	LMP2	N.Leventis, D.Watts, J.Kane	Strakka Racing	Gibson/Nissan	1m56.887ss	10.452s
16	LMP2	R.Rusinov, J.Canal, S.Bird	G-Drive Racing	Ligier/Nissan	1m57.327ss	10.892s
17	LMP2	E.Brown, J.van Overbeek, J.Fogarty	Extreme Speed Motorsports	Ligier/HPD	1m57.382ss	10.947s
18	GTE Pro	P.Pilet, F.Makowiecki	Porsche Team Manthey	Porsche	2m05.134ss	18.699s
19	GTE Pro	G.Bruni, T.Vilander	AF Corse	Ferrari	2m05.379ss	18.944s
20	GTE Pro	R.Lietz, M.Christensen	Porsche Team Manthey	Porsche	2m05.521ss	19.086s
21	GTE Pro	F.Rees, A.MacDowall, R.Stanaway	Aston Martin Racing	Aston Martin	2m05.995ss	19.560s
22	GTE Pro	D.Rigon, J.Calado	AF Corse	Ferrari	2m06.275ss	19.840s
23	GTE Pro	D.Turner, J.Adam	Aston Martin Racing	Aston Martin	2m06.564ss	20.129s
24	GTE Am	P.D.Lana, P.Lamy, M.Lauda	Aston Martin Racing	Aston Martin	2m06.639ss	20.204s
25	GTE Am	G.Roda, P.Ruberti, K.Poulsen	Larbre Competition	Chevrolet	2m06.760ss	20.325s
26	GTE Pro	M.Sorensen, C.Nygaard	Aston Martin Racing	Aston Martin	2m06.821ss	20.386s
27	GTE Am	V.Shaitar, A.Bertolini, A.Basov	SMP Racing	Ferrari	2m07.026ss	20.591s
28	GTE Am	C.Ried, K.Al Qubaisi, E.Bamber	Abu Dhabi-Proton Racing	Porsche	2m07.596ss	21.161s
29	GTE Am	F.Perrodo, E.Collard, R.Aguas	AF Corse	Ferrari	2m07.728ss	21.293s
30	GTE Am	F.Castellacci, B.Simonsen, S.Hall	Aston Martin Racing	Aston Martin	2m07.777ss	21.342s
31	GTE Am	P.Dempsey, P.Long, M.Seefried	Dempsey Racing - Proton	Porsche	2m09.826ss	23.391s